Please let me know what is the minimum via size and the minimum copper diameter around the via.
1) The minimum via size means the minimum diameter for the PTH (Plated Through Hole) or NPTH( Non-Plated Through Hole).
Normally, for MCPCB, the minimum diameter of PTH is 0.3mm, the NPTH is 0.25mm.
2) The meaning of the minimum copper diameter around the via is hole ring.
Normally, the minimum diameter of hole ring is 0.2mm.
No, it is not always. There are many factors to be taken into account, e.g. how many layers, the thickness of the PCB and also a good understanding of the assembly process (number of soldering cycles, time above 260 degrees, etc.). Some research has shown that a material with a “standard†Tg value has even performed better than some materials with a higher Tg value. Note that even with “leaded†soldering the Tg value is exceeded.
What is of most importance is how the material behaves at temperatures above the Tg value (post Tg) so knowing the temperature profiles the board will be subjected to will help you look evaluate the necessary performance characteristics.
The relationship between the diameter of the hole and its length. When a manufacturer states that their production has an “aspect ratio†of 8:1 it means, for example, that the hole’s diameter is 0.20 mm in a 1.60 mm thick PCB.
For HDI structures, a suitable aspect ratio for micro via is normally 0.8:1, with 1:1 preferable for ease of plating.
Normally working temperature of MCPCB is <130℃, better less than 100C, dielectric layer in MCPCB is the bottle neck for high temperature, as the Tg value of that layer is only 130℃
Ceramic PCB can be: -50℃ to 800℃.
So if temperature higher than 130℃, then Ceramic PCB or High Tg PCB (but only around 170C) is good choice.
EBest Circuit (Best Technology) Co, Limited, establish on June 28, 2006, is a Hong Kong registered company that focused on MCPCB, FR4 PCB, Ceramic PCB, Special PCB such as Heavy Copper (up to 20 OZ), and PCB assembly service. EBest Circuit (Best Technology) has been established for ten years, and has been better and better, hope we can help you more in further.
Following information is the activity that our Sales Department celebrate the 10th for EBest Circuit (Best Technology) Co, Limited.
Couple photos at the seaside
Review the History of EBest Circuit (Best Technology) Co, Limited
The founder Peter share the history of EBest Circuit (Best Technology)
Perfect attendance award for Coco
We have a good team to help you all about PCB, so don’t hesitate to contact us if any questions, we are always here for you.
My dear friend,
It is really our honor to cooperate with you in these year. We would like to advise you that June 28th, 2016 is the 10th birthday of our company. To thank you for your sincerely accompany and long-term cooperation, we are willing to send you some gifts, at the same time, celebrate the 10th anniversary with you. All of them are customized for you by the EBest Circuit (Best Technology) Co., Limited, only hope you could enjoy them and be able to cooperate in the future. The following information is to help you know more details about our gift.
This backpack looked small, but it has a very excellent performance.
Features:
1.Durable, compact and portable.
2.Made of high quality dacron, durable and water resistant. Provide strengthen and long-lasting performance with minimal weight.
3.Light weight and roomy, a space saver, folds into zippered inner pocket to fit anywhere, unfolds from pocket to backpack and our company logo “BEST technology” is invisible after opening , Good solution for trip.
4.The reflective cloth, will be bright when the the reflective cloth is under lights at night and make the backpack more conspicuous to provide an extra protection of security.
5.Multi-compartments: a classic shape with several pockets for storage and organization: A roomy main compartment, two front zipper pockets to hold small accessories, one internal security zippered pocket for valuable items and two side pockets for water bottle or umbrella.
The Backpack
The Backpack
Even though this is a small mobile phone sets, when you going sport in outdoors or indoors, you could put your phone into the phone case, to allow you do exercise and fitness better.
Features:
1.Universal running sport armband for various mobiles .
2.Durable, keeps your phone secure and protected.
3.Flexible, lightweight, smooth and soft, makes your figure cool.
4.Form-fitting design, adjustable hasp armband gives you the versatility of carrying your phone in a variety of ways.
5.Clear, play-through mask design gives you full protection and total access to controls.
6.Water resistant design keeps your device dry, washable.
Sports Armband
Sports Armband
Features:
1.Water resistant , durable, compact and portable.
2.Can be used both as purse and shoulder bag.
3.Smart and portable, offer good solution for your smart phone and important small things when running, hiking, climbing or doing anyoutdoor sports.
Small Wallet
All of the three goods are customized for you by the EBest Circuit (Best Technology) Co., Limited. Hope you could enjoy them and we always are able to cooperate in the future.
It is Mother’s Day last Sunday, and happy mother’s day to all ma ma.
There are six mothers in our Marketing Department, and they are very beautiful mothers with good staff. Wish them a happy mother’s day.
So beautiful flower, so beautiful mothers.
If you would like to know more details for Mother’s Day, you can check it on Wiki, and here is a quick portal to help you.
You can click to know or order PCB, we are always here for you.
Yes, we produced all kinds of FR4 PCB in one panel and also combine two kinds FR4 PCB together with SMT so far.
Please check the following pictures to know more detail.
Different design in on panel
Different design in one panel
We provide turnkey assembly service, so don’t hesitate to contact us if you have any questions about PCB manufacturing and assembly.
Normally, we send the goods to customers by Express. But it’s only for a small quantity and light weight. If mass production, the quantity always big and with heavy weight. if still by Express, the shipping fee would be very high. It’s no economy.So we will choose to ship out by Sea or By air.
As PCB manufacturer we can provide turnkey and door to door service, meanwhile we also can help you if you have any shipping questions.