{"id":38257,"date":"2026-11-03T11:23:59","date_gmt":"2026-11-03T03:23:59","guid":{"rendered":"https:\/\/www.bestpcbs.com\/blog\/2026\/11\/it180a-pcb-material\/"},"modified":"2026-11-03T11:23:59","modified_gmt":"2026-11-03T03:23:59","slug":"it180a-pcb-material","status":"publish","type":"post","link":"https:\/\/www.bestpcbs.com\/blog\/2026\/11\/it180a-pcb-material\/","title":{"rendered":"What Is IT180A PCB Material? Properties, Uses and Manufacturing Guide"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_89 ez-toc-wrap-left counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Table of Contents<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/www.bestpcbs.com\/blog\/2026\/11\/it180a-pcb-material\/#What_Is_IT180A_PCB_Material\" >What Is IT180A PCB Material?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/www.bestpcbs.com\/blog\/2026\/11\/it180a-pcb-material\/#Why_Is_IT180A_Used_in_Multilayer_PCBs\" >Why Is IT180A Used in Multilayer PCBs?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.bestpcbs.com\/blog\/2026\/11\/it180a-pcb-material\/#How_Do_Tg_Td_and_CTE_Describe_IT180A\" >How Do Tg, Td and CTE Describe IT180A?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/www.bestpcbs.com\/blog\/2026\/11\/it180a-pcb-material\/#What_Are_the_Detailed_IT180A_Material_Parameters\" >What Are the Detailed IT180A Material Parameters?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/www.bestpcbs.com\/blog\/2026\/11\/it180a-pcb-material\/#IT180A_vs_Standard_FR4_What_Is_the_Difference\" >IT180A vs Standard FR4: What Is the Difference?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/www.bestpcbs.com\/blog\/2026\/11\/it180a-pcb-material\/#Why_Do_IT180A_Datasheet_Values_Differ_by_Revision\" >Why Do IT180A Datasheet Values Differ by Revision?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/www.bestpcbs.com\/blog\/2026\/11\/it180a-pcb-material\/#How_Does_IT180A_Support_Lead-Free_Reflow\" >How Does IT180A Support Lead-Free Reflow?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/www.bestpcbs.com\/blog\/2026\/11\/it180a-pcb-material\/#How_Does_IT180A_Affect_Plated-Hole_Reliability\" >How Does IT180A Affect Plated-Hole Reliability?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/www.bestpcbs.com\/blog\/2026\/11\/it180a-pcb-material\/#Is_IT180A_Suitable_for_Controlled_Impedance\" >Is IT180A Suitable for Controlled Impedance?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/www.bestpcbs.com\/blog\/2026\/11\/it180a-pcb-material\/#Is_IT180A_a_Low-Loss_Material\" >Is IT180A a Low-Loss Material?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/www.bestpcbs.com\/blog\/2026\/11\/it180a-pcb-material\/#How_Should_IT180A_Cores_and_Prepregs_Be_Specified\" >How Should IT180A Cores and Prepregs Be Specified?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/www.bestpcbs.com\/blog\/2026\/11\/it180a-pcb-material\/#Which_PCB_Applications_Use_IT180A\" >Which PCB Applications Use IT180A?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/www.bestpcbs.com\/blog\/2026\/11\/it180a-pcb-material\/#How_Do_We_Manufacture_IT180A_Multilayer_PCBs\" >How Do We Manufacture IT180A Multilayer PCBs?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"https:\/\/www.bestpcbs.com\/blog\/2026\/11\/it180a-pcb-material\/#IT180A_FAQs\" >IT180A FAQs<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-15\" href=\"https:\/\/www.bestpcbs.com\/blog\/2026\/11\/it180a-pcb-material\/#What_Should_You_Include_in_an_IT180A_PCB_RFQ\" >What Should You Include in an IT180A PCB RFQ?<\/a><\/li><\/ul><\/nav><\/div>\n<div class=\"yzp-no-index\"><\/div><p><a href=\"https:\/\/www.bestpcbs.com\/blog\/2026\/11\/it180a-pcb-material\/\"><strong>IT180A<\/strong><\/a> is the common search form of ITEQ&#8217;s IT-180A, a halogen-free, high-Tg FR-4 laminate system developed for multilayer PCBs that need lower Z-axis expansion than conventional FR-4. Its value is not just a higher glass-transition temperature. Designers choose it when plated-hole reliability, lead-free assembly exposure, dimensional stability and a manufacturable multilayer stackup must be considered together. The exact laminate or prepreg designation and datasheet revision still matter, so a material callout should identify more than the words \u201chigh Tg.\u201d<\/p>\n<div class=\"wp-block-image\"><figure class=\"aligncenter\"><img loading=\"lazy\" decoding=\"async\" alt=\"IT180A PCB material used in a realistic high-density multilayer PCB\" height=\"400\" src=\"https:\/\/www.bestpcbs.com\/blog\/wp-content\/uploads\/2026\/11\/it180a-pcb-material-hero.jpg\" width=\"600\"\/><\/figure><\/div>\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"What_Is_IT180A_PCB_Material\"><\/span>What Is IT180A PCB Material?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>IT180A is a high-Tg, filled epoxy FR-4 laminate and prepreg family. The official material name normally appears as <strong>IT-180A<\/strong>; the unhyphenated <strong>IT180A PCB material<\/strong> is the same search term, not a different grade. It uses woven glass reinforcement and a phenolic-cured resin system. Copper-clad cores and matching prepregs can be combined in a multilayer construction, subject to the available glass styles, resin contents, copper foils and dielectric thicknesses.<\/p>\n<p>At EBest Circuit (Best Technology), we use the approved material designation in the stackup and purchasing record. We do not treat every high-Tg FR-4 as an automatic substitute because resin behavior, dielectric data, available constructions and customer approvals may differ.<\/p>\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Why_Is_IT180A_Used_in_Multilayer_PCBs\"><\/span>Why Is IT180A Used in Multilayer PCBs?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>IT180A is used when a multilayer board needs stronger thermal robustness than a basic FR-4 construction. A higher Tg keeps the resin in its glassy state over a wider temperature range, while lower Z-axis expansion reduces the amount of thickness-direction movement applied to plated through holes during heating. Those two properties support reliability, but neither one alone proves that a finished board will survive its assembly profile or field environment.<\/p>\n<p>For a <a href=\"https:\/\/www.bestpcbs.com\/products\/multi-layer-pcb.htm\">multilayer PCB<\/a>, the complete result also depends on layer count, finished thickness, hole diameter, copper balance, resin fill, lamination quality, drill condition and copper plating. Material selection and fabrication design therefore need to be reviewed as one stackup.<\/p>\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"How_Do_Tg_Td_and_CTE_Describe_IT180A\"><\/span>How Do Tg, Td and CTE Describe IT180A?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Tg, Td and CTE answer different questions. Tg marks the glass transition of the cured resin. Td is a decomposition-temperature measurement based on mass loss. CTE describes how quickly the material expands with temperature, and its value changes above Tg. A board does not become unusable the moment it reaches Tg, and a high Td does not mean the laminate can operate continuously near that temperature.<\/p>\n<div class=\"wp-block-image\"><figure class=\"aligncenter\"><img loading=\"lazy\" decoding=\"async\" alt=\"Difference between IT180A Tg, Td and Z-axis CTE\" height=\"400\" src=\"https:\/\/www.bestpcbs.com\/blog\/wp-content\/uploads\/2026\/11\/it180a-thermal-parameters.jpg\" width=\"600\"\/><\/figure><\/div>\n<p>This distinction prevents a common specification error: using one headline temperature as a replacement for the entire thermal profile. Reflow peak temperature, time above liquidus, repeated cycles, board moisture and the operating environment must be evaluated separately.<\/p>\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"What_Are_the_Detailed_IT180A_Material_Parameters\"><\/span>What Are the Detailed IT180A Material Parameters?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>The following values are representative of the referenced multi-page IT-180A datasheet. They must remain attached to the stated method, frequency and material construction. Values can change with resin content, specimen thickness and datasheet revision.<\/p>\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\">\n<thead><tr><th>Parameter<\/th><th>Representative IT-180A value<\/th><th>Method or condition<\/th><th>How to use it<\/th><\/tr><\/thead>\n<tbody>\n<tr><td>Tg<\/td><td>175\u00b0C typical; 170\u00b0C minimum<\/td><td>DSC<\/td><td>Compare resin transition behavior using the same test method.<\/td><\/tr>\n<tr><td>Td<\/td><td>345\u00b0C typical; 340\u00b0C minimum<\/td><td>TGA, 5% weight loss<\/td><td>Do not use as a continuous operating-temperature rating.<\/td><\/tr>\n<tr><td>Z-axis CTE below Tg<\/td><td>45 ppm\/\u00b0C typical<\/td><td>TMA, alpha 1 region<\/td><td>Supports plated-hole strain analysis below Tg.<\/td><\/tr>\n<tr><td>Z-axis CTE above Tg<\/td><td>210 ppm\/\u00b0C typical<\/td><td>TMA, alpha 2 region<\/td><td>Shows why time above Tg matters during thermal exposure.<\/td><\/tr>\n<tr><td>Z-axis expansion<\/td><td>Approximately 2.7%<\/td><td>50\u2013260\u00b0C<\/td><td>Use with board thickness and PTH geometry, not as a stand-alone pass\/fail limit.<\/td><\/tr>\n<tr><td>Dk<\/td><td>Approximately 4.4 at 1 GHz<\/td><td>Representative datasheet construction<\/td><td>Confirm the actual construction and frequency before impedance modeling.<\/td><\/tr>\n<tr><td>Df<\/td><td>Approximately 0.015 at 1 GHz<\/td><td>Representative datasheet construction<\/td><td>Shows that high Tg does not automatically mean low loss.<\/td><\/tr>\n<tr><td>Flammability<\/td><td>UL 94 V-0<\/td><td>Listed construction and thickness range<\/td><td>Verify the applicable UL construction instead of copying the label alone.<\/td><\/tr>\n<\/tbody>\n<\/table><\/figure>\n<p>Older and newer IT180A datasheets may show different typical values or test presentations. The approved fabrication package should therefore retain the supplier, exact grade and revision used for the design decision.<\/p>\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"IT180A_vs_Standard_FR4_What_Is_the_Difference\"><\/span>IT180A vs Standard FR4: What Is the Difference?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>IT180A is still an FR-4 material, but it is formulated for higher Tg and lower Z-axis expansion than many conventional FR-4 grades. The practical comparison is not \u201cFR-4 or IT180A\u201d; it is IT180A versus the exact alternative grade and construction being considered.<\/p>\n<div class=\"wp-block-image\"><figure class=\"aligncenter\"><img loading=\"lazy\" decoding=\"async\" alt=\"IT180A versus standard FR4 under thermal cycling around a plated through hole\" height=\"400\" src=\"https:\/\/www.bestpcbs.com\/blog\/wp-content\/uploads\/2026\/11\/it180a-vs-standard-fr4.jpg\" width=\"600\"\/><\/figure><\/div>\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\">\n<thead><tr><th>Selection point<\/th><th>Conventional FR-4<\/th><th>IT180A high-Tg FR-4<\/th><th>What still needs confirmation<\/th><\/tr><\/thead>\n<tbody>\n<tr><td>Glass transition<\/td><td>Usually lower, depending on the grade<\/td><td>DSC Tg around 175\u00b0C in the referenced sheet<\/td><td>Use the same Tg test method for comparison.<\/td><\/tr>\n<tr><td>Z-axis expansion<\/td><td>May be higher during assembly heating<\/td><td>Designed for lower Z-axis expansion<\/td><td>Check the actual alternative-grade datasheet.<\/td><\/tr>\n<tr><td>Lead-free assembly<\/td><td>Depends strongly on grade and board design<\/td><td>Intended for lead-free multilayer applications<\/td><td>Validate moisture control and the real reflow profile.<\/td><\/tr>\n<tr><td>Signal loss<\/td><td>Varies by resin system and construction<\/td><td>Not automatically a low-loss laminate<\/td><td>Compare Dk\/Df at the design frequency.<\/td><\/tr>\n<tr><td>Fabrication<\/td><td>Common process knowledge is widely available<\/td><td>Requires approved constructions and material control<\/td><td>Confirm availability, stackup and process window.<\/td><\/tr>\n<\/tbody>\n<\/table><\/figure>\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Why_Do_IT180A_Datasheet_Values_Differ_by_Revision\"><\/span>Why Do IT180A Datasheet Values Differ by Revision?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Datasheet values differ because suppliers revise products, test methods, presentation formats and representative constructions. For example, an older sheet may present a rounded Tg or Td that is not identical to a later multi-page sheet. Dk and Df can also vary with resin content, glass style, thickness and frequency.<\/p>\n<p>Do not build a specification by selecting the best value from several documents. Record the exact source revision and keep each number with its method and condition. If an engineering drawing calls out a minimum property, it should state the method used to verify that property.<\/p>\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"How_Does_IT180A_Support_Lead-Free_Reflow\"><\/span>How Does IT180A Support Lead-Free Reflow?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>IT180A supports lead-free assembly by combining high Tg, suitable decomposition resistance and controlled Z-axis expansion. The laminate datasheet includes time-to-delamination indicators such as T260 and T288, but those values are material tests, not a guarantee for every completed PCB.<\/p>\n<p>A finished board adds drilled holes, copper plating, solder mask, absorbed moisture and local copper-density differences. Before assembly, define storage and baking controls where needed, and review the actual number of reflow or rework cycles. A short assembly peak is not the same as continuous operating temperature.<\/p>\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"How_Does_IT180A_Affect_Plated-Hole_Reliability\"><\/span>How Does IT180A Affect Plated-Hole Reliability?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Lower Z-axis expansion can reduce strain on a plated through-hole barrel during thermal cycling. It does not remove the need for correct hole design and plating. Finished board thickness, drilled diameter, aspect ratio, copper thickness, drill smear removal and annular-ring geometry still control the stress concentration and current path.<\/p>\n<p>We review the smallest finished hole against the stack thickness before confirming a build. Our listed rigid-PCB capability includes a normal minimum hole of 0.20 mm, a 0.10 mm HDI minimum hole and an 8:1 aspect ratio, but these limits are not automatically combinable with every IT180A stackup. The actual panel size, layer count, copper weights and reliability requirements must pass DFM together.<\/p>\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Is_IT180A_Suitable_for_Controlled_Impedance\"><\/span>Is IT180A Suitable for Controlled Impedance?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Yes, IT180A can be used for controlled-impedance routing, provided the calculation uses the actual core and prepreg constructions. A single generic Dk value is not enough. The field solver needs finished copper thickness, trace width, spacing, solder mask condition, dielectric thickness and a Dk appropriate to the material construction and frequency.<\/p>\n<p>For an <a href=\"https:\/\/www.bestpcbs.com\/products\/HDI-board.htm\">HDI PCB<\/a>, laser-via build-up and thin dielectrics add more construction variables. Send the target impedance, layer assignment and stack constraints with the Gerber or ODB++ data so that the proposed stack can be checked before production.<\/p>\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Is_IT180A_a_Low-Loss_Material\"><\/span>Is IT180A a Low-Loss Material?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>No. IT180A is primarily a high-Tg, low-CTE FR-4 material, not a dedicated ultra-low-loss laminate. The referenced sheet gives a representative Df around 0.015 at 1 GHz. That may be acceptable for many digital and industrial boards, but high-speed channels should be evaluated by insertion-loss budget, route length, frequency content, copper roughness and the exact construction.<\/p>\n<p>If loss is the limiting requirement rather than plated-hole thermal robustness, compare IT180A with an appropriate low-loss family. Do not select a material only because its Tg is higher.<\/p>\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"How_Should_IT180A_Cores_and_Prepregs_Be_Specified\"><\/span>How Should IT180A Cores and Prepregs Be Specified?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Specify the manufacturer, exact grade, core thickness, copper weight on each face and the required prepreg construction. \u201cIT180A prepreg thickness\u201d is not one universal number. Pressed thickness depends on glass style, resin content, copper distribution, flow and the surrounding stack.<\/p>\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\">\n<thead><tr><th>Specification item<\/th><th>What to provide<\/th><th>Why it matters<\/th><\/tr><\/thead>\n<tbody>\n<tr><td>Material identity<\/td><td>ITEQ IT-180A or an explicitly approved alternate<\/td><td>Prevents an unreviewed high-Tg substitution.<\/td><\/tr>\n<tr><td>Core construction<\/td><td>Dielectric thickness and copper weight on both faces<\/td><td>Controls impedance, overall thickness and etch feasibility.<\/td><\/tr>\n<tr><td>Prepreg<\/td><td>Glass style or target pressed dielectric with resin requirement<\/td><td>Supports resin fill and dielectric control.<\/td><\/tr>\n<tr><td>Finished board<\/td><td>Overall thickness, tolerance, hole sizes and copper requirements<\/td><td>Connects material selection to fabrication acceptance.<\/td><\/tr>\n<tr><td>Electrical targets<\/td><td>Impedance values, layers, tolerances and test method<\/td><td>Allows a construction-specific field-solver review.<\/td><\/tr>\n<\/tbody>\n<\/table><\/figure>\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Which_PCB_Applications_Use_IT180A\"><\/span>Which PCB Applications Use IT180A?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>IT180A is used in multilayer boards for automotive electronics, servers, networking equipment, telecom systems, data storage, industrial controls and heavy-copper designs. These applications do not use the material for one identical reason. A server backplane may prioritize layer count and plated-hole durability, while an automotive controller may emphasize repeated thermal exposure and dimensional stability.<\/p>\n<div class=\"wp-block-image\"><figure class=\"aligncenter\"><img loading=\"lazy\" decoding=\"async\" alt=\"High-Tg multilayer PCB formats for networking automotive and industrial electronics\" height=\"400\" src=\"https:\/\/www.bestpcbs.com\/blog\/wp-content\/uploads\/2026\/11\/it180a-applications.jpg\" width=\"600\"\/><\/figure><\/div>\n<p>The material is also relevant where lead-free assembly and multiple thermal cycles make a basic laminate marginal. Application names alone do not define the stack. The board-level requirements must still be translated into layer count, copper, hole geometry, impedance, thermal profile and acceptance criteria.<\/p>\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"How_Do_We_Manufacture_IT180A_Multilayer_PCBs\"><\/span>How Do We Manufacture IT180A Multilayer PCBs?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>We begin with material and stackup review, then check inner-layer geometry, copper balance, prepreg resin demand, drill aspect ratio, lamination thickness and controlled-impedance requirements. Material identity is retained through purchasing and production records. Lamination, drilling, desmear and plating controls are matched to the approved construction rather than inferred from the words \u201chigh Tg.\u201d<\/p>\n<p>EBest Circuit&#8217;s listed rigid-board capability extends to 32 layers, with normal 4\/4 mil line and space and HDI capability down to 2\/2 mil under suitable designs. These are capability boundaries, not a promise that the most aggressive line, hole, layer and thickness limits can all be combined in one board. We confirm the manufacturable combination after reviewing the data package.<\/p>\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"IT180A_FAQs\"><\/span>IT180A FAQs<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<h3 class=\"wp-block-heading\">Is IT180A the same as IT-180A?<\/h3>\n<p>Yes. IT-180A is the formal hyphenated material name; IT180A is the common search and shorthand form.<\/p>\n<h3 class=\"wp-block-heading\">Can IT180A replace any standard FR-4 material?<\/h3>\n<p>No. Electrical properties, constructions, approvals, availability and process requirements must be compared before substitution.<\/p>\n<h3 class=\"wp-block-heading\">What is the IT180A prepreg thickness?<\/h3>\n<p>There is no single thickness. Pressed thickness depends on glass style, resin content, copper distribution and the stackup. Use an approved construction proposal.<\/p>\n<h3 class=\"wp-block-heading\">Does a 175\u00b0C Tg mean a PCB can operate continuously at 175\u00b0C?<\/h3>\n<p>No. Tg is a resin transition measurement, not a continuous-use temperature rating. Use the applicable material listing and the finished assembly&#8217;s environmental requirements.<\/p>\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"What_Should_You_Include_in_an_IT180A_PCB_RFQ\"><\/span>What Should You Include in an IT180A PCB RFQ?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>To prepare an accurate quotation, we need the Gerber or ODB++ data, drill files, fabrication drawing, stackup, finished thickness, copper weights, minimum holes, impedance targets, surface finish, quantity and assembly thermal requirements. Tell us whether IT-180A is mandatory or whether we may propose an alternate for approval. If the material revision or UL construction is controlled, include that requirement rather than relying on a generic \u201chigh-Tg FR-4\u201d note.<\/p>\n<p>For an <a href=\"https:\/\/www.bestpcbs.com\/products\/high-tg-board.htm\">IT180A high-Tg PCB<\/a> build review, send the complete files to <a href=\"mailto:sales@bestpcbs.com\">sales@bestpcbs.com<\/a>. Our PCB team will review the <a href=\"https:\/\/www.bestpcbs.com\/blog\/2026\/11\/it180a-pcb-material\/\"><strong>IT180A<\/strong><\/a> material callout and stackup before confirming the construction.<\/p>","protected":false},"excerpt":{"rendered":"<p>IT180A is ITEQ&#8217;s high-Tg, low-CTE FR4 laminate. 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