Welcome Back to Office, Welcome to Contact Best Technology

February 5th, 2017

Hello Everybody! We had backed to office on Feb 5! (The ninth day of first month of Chinese Lunar Calendar)

It’s a lucky and sunny day! We had 12 people backed to office (excludes people in factory) and according to Chinese culture, number 12 means every month will be lucky and full of successful!

Today one more girl back, tomorrow another guy will back. It’s a normal thing people didn’t back to office on the first day because there’re always something unexpected, such as Wedding, etc. In 2017, we had saw the new baby born of Tiffany’s, wedding party of Hanna, and this year we will see more baby and wedding!

Everybody was so happy to see each other after 2 weeks Spring Festival and eat the wedding candies, as well as checking and replying emails. We have a simple and colorful lunch together and in the afternoon went to Phoenix Mountain Forest for hiking.

Best Technology in Phoenix Mountain Forest

Best Technology in Phoenix Mountain Forest

 

 

 

 

 

 

 

 

This is a traditional activity on the first working day after New Year vacation in our company. We can talk to each other under the open air, everybody shared their stories and we always laugh when heard something interested happened during holiday.

Boy and girl with Company Vision

Boy and girl with Company Vision

 

 

 

 

 

 

 

 

 

 

 

 

We believe after such long vacation, all of our team members were fresh with energy and are ready to provide best service and suitable products to our customers. Looking forward to hearing more news from our customers, partners, friends and family, as well as looking for new people to join our team to make their dreams come true!

Happy Girls On Mountain

Happy Girls On Mountain

 

 

 

 

 

 

 

 

 

 

 

 

Best Technology Team Member on top of Phoenix Mountain

Best Technology Team Member on top of Phoenix Mountain

 

 

 

 

 

 

 

 

 

 

 

 

 

 

If any enquiry for Printed Circuit board, whatever it is heavy copper PCB (up to 20OZ), or extra thin PCB (0.15mm), Metal Core PCB (1-10 layers), Ceramic PCB, or SMT (PCBA), welcome to contact us. You will see how Best Technology can save your time and money!

Customer Oren and Amitay from Israel visited our company

October 14th, 2016

On Oct 14th, customer Oren and Amitay from Israel visited our company. They are very nice and smart, just arrived at our office without any more instruction. We’re old friends since 2011 but never meet each other in China. After drinking Chinese black tea, we had a delicious lunch: Chinese traditional Hot Pot and fried fish with red pepper.

Hot pot & fried fish lunch

Hot pot & fried fish lunch

 

 

 

 

 

 

 

 

We also took photo with some of sales girls in office. You can see, how happy we are!

In office with sales girls

In office with sales girls

 

 

 

 

 

 

 

After that, they visited our Printed Circuit Board factory to visit whole PCB manufacturing process. From initial PCB raw material cutting, CNC drilling, exposure, etching, copper platting, soldermask & silkscreen printing, CNC routing, V-cutting, to final opening & shorting testing, flying probe testing, FQC and packaging. We also introduce our special board such as heavy copper PCB, extra thin PCB.

PCB raw material CNC drill (1st drilling, to make PTH (plating through hole)

PCB raw material CNC drill (1st drilling, to make PTH (plating through hole)

 

 

 

 

 

 

 

 

PCB DES line (developing, Etching, stripping)

PCB DES line (developing, Etching, stripping)

 

 

 

 

 

 

 

PCB CNC Routing & Milling
PCB CNC Routing & Milling

 

PCB flying probe testing to test PCB opening & shorting

PCB flying probe testing to test PCB opening & shorting

 

 

 

 

 

 

 

 

 

After visiting whole process of FR4 Printed Circuit board and Metal Core PCB, they speak highly of us and also give us some suggestion to help us to improve our PCB manufacturing level and PCB quality. Thank you Oren and Amitay.

Looking forward to seeing you soon in Israel in 2017.

Soldermask on Hole (Via) Without Opening

October 6th, 2016

Soldermask opening always is a very important thing for various PCB, esp. for rigid FR4 PCB. In previous article, we already discussed why soldermask opening & tented was not the same like original gerber file.

If you really want soldermask opening for hole (Via) less than 0.60mm, you should added special notice when placing order.

At the same time, there’s another method you can use: To increase the soldermask opening diameter, that means add an “Annular Ring”. Normally you will need to increase 0.10mm (4mil) on each side, so that there’ll be a 0.1mm “Annular Ring” around the hole/Via, that Annual ring will stop soldermask into the hole/via of PCB.

Because in a lot of design, if there’s Via/Hole, there’ll no opening in its soldermask file, maybe engineer think the drill will remove the soldermask and then there’ll no soldermask on these Via/hole of board. As mentioned before, if Via/Hole in Printed circuit board was less than 0.6mm, or around 0.65mm then it’ll be a problem.

See from bellowing pictures of PCB board:

0.635mm Drill hole (Via)

0.635mm Drill hole (Via)

(0.635mm Drill hole (Via)

This is the original PCB Gerber file, the diameter of drill hole was 0.635mm and there’s no soldermask opening on GTS (top soldermask) Gerber file. (Purple color was GTS, Yellow: GTL (top layer); Blue: Drill (PTH) file), and no Annular Ring.

So final circuit boards will be like belowing:

0.635mm Via covered/tented by soldermask

0.635mm Via covered/tented by soldermask

 

 

 

 

 

 

 

 

 

 

 

So you need to add at least 0.10mm (4mil) soldermask opening on each side of hole, so that there’ll be a 0.1mm Annular Ring, like bellowing:

Add 4mil Annular Ring on PCB Via

Add 4mil Annular Ring on PCB Via

 

 

 

 

 

 

 

 

 

 

Then that hole will become like bellowing:

Hole/Via without soldermask (soldermask opened)

Hole/Via without soldermask (soldermask opened)

 

 

 

 

 

 

 

 

 

 

We believe there’re a lot of other handling method about that soldermask opening, please leave your comments, or contact us to discuss more about that, and believe you will be happy to receive with the PCB with correct soldermask opening!

Why Soldermask Opening or Tented was not the same like the Original Gerber file?

August 29th, 2016

Recently customer compliant that the soldermask for some holes, esp for PTH (plated through hole, sometimes people named Via) was wrong, because in his original Gerber file, it was opened, but on actual printed circuit board, it was tented (covered), and some cases, some was tented and some was opened at the same time. It made customer confused.

In fact, there’s a default rule in PCB (printed circuit board) manufacturing: If the PTH (Via) was less than 0.60mm, then the soldermask will be made as per factory’s default rules: making them as tented (covered), regardless it was tented or opened in customers’ original Gerber file.

Here you can see pictures showing a board with a 0.30mm PTH, soldermask was opened in original Gerber file, but in real board, it was tented.

0.3mm Via soldermask

0.3mm Via soldermask

And in this board, for 0.508mm PTH (via), some soldermask was opened and some was opened.

0.508mm Via soldermask

0.508mm Via soldermask

Why like that? Here are two major reasons:

1) For PTH(via) less than 0.6mm, normally the function was only to electrically connected trace, not for electronic components assembled; so whatever PTH was opened or tented, it doesn’t matter.
2) In rigid printed circuit board manufacturing, it’s not easy to etch away the soldermask around PTH less than 0.60mm. As soldermask was made by that method: printed whole area with oil (soldermask), then undergo develop & exposure, then pass the etching line. The chemical will etch away the oil accordingly to the drawing, but if the hole was too small (less than 0.60mm), then the oil around will be very difficult to etch away, so you will see some oil was etched away (soldermask opened), some oil still here (soldermask tented)

If diameter of hole was bigger than 0.60mm, then it’ll be easy to etch away and some of them will be used in assembly, so we will make according to Gerber file and you will see the board exactly like the drawing. See bellowing a picture showing a board with 0.889mm (0.035mil) PTH.

0.889mm Via soldermask opening

0.889mm Via soldermask opening

Sometimes, people just use these hole as testing point, not for assembly, then we suggest to add another PAD connected to this hole so that you can test it easy. To tested on hole was not stable as tested on a PAD.

In a conclusion, in future, if the hole was less than 0.60mm and you really want it to be opened, please add special notes when release order, and allow us to enlarge the opening diameter of soldermask (around 0.60mm) so that soldermask of these holes will be opened.

Please contact us if still any question about soldermask opening.

New Automatic Solder paste Printer Adopted in SMT & PCBA

August 25th, 2016

Great news! We (Best Technology) had adopted a new Automatic Solder paste printer for SMT /PCBA since Aug 25th, 2016. We use “G5” which is No. 1 brand in domestic market, made by a Chinese company, the repeated position accuracy is +/-0.01mm, and printing accuracy is +/-0.025mm.

Everybody know the most important element which will affect the quality of SMT /PCBA is the solder past printing quality. Excellent solder paste printing is the base for excellent quality of final SMT /PCBA quality, esp. for the small components such as SMD Chips with small size as 0402, 0201, 01005; IC with small pitch package such QFN, LGA, BGA; Connector with 0.25mm, 0.3mm, 0.40mm pitch.

Here are some pictures of new Automatic Solder paste printer.

Auto Solder Paste Printer

Auto Solder Paste Printer

Auto Solder Paste Printer printing the board

Auto Solder Paste Printer printing the board

Auto Solder Paste Printer with PCB printing

Auto Solder Paste Printer with PCB printing

PCB with solder paste

PCB with solder paste

Welcome customers release more SMT /PCBA orders to us. To learn more about Automatic Solder paste printer, or our SMT /PCBA service, please contact us right now!

Which kinds outline process can make PCB less burr?

August 12th, 2016

Generally there are two methods to do PCB outline, routing and punching.

 

Routing is suit for those simple boards with simple outline. But it is easy to cause burr on the edge. Also, if don’t make the tooling holes well, the boards may be easy moving while routing, which cause to the outline crooked.-

 

So, If you need the outline more precision and nice, the best way is to custom a tool for punching, in such way, the outline shape is very exact and no so much burr on the edge. It is used for those boards in big panel with small boards, special outline as well as high precision boards. Punching also can speed up the production lead time.  But for such way the cost is expensive than routing.

What’s the difference for FR1, FR2, FR3 and FR4 materials?

August 12th, 2016

FR1 is basically the same as FR2. FR1 has a higher TG of 130oC instead of 105oC for FR2. Some laminate manufacturers who produce FR1 may not produce FR2 since the cost and usage are similar and it is not cost effective for having both.

FR3 is also basically FR2. But instead of phenolic resin it uses an epoxy resin binder.

 

FR4 (FR = Flame Retardent )is a glass fiber epoxy laminate. It is the most commonly used PCB material. 1.60 mm (0.062inch). FR4 uses 8 layers glass fiber material. The maximum ambient temperature is between 120o and 130oC, depending on thickness.

In China FR4 is the most widely used PCB base material, next is FR1 then FR2. But FR1 and FR2 are usually used for 1-layer PCBs because they are not good for passing through holes. FR3 is not recommended to building multi-layer PCBs. FR4 is the best selection. FR4 is widely used because it is good to make from one- layer to multi-layer PCBs. With only FR4, PCB companies can make all kinds of PCBs, which leaves the management and quality control much easier, and eventually it can reduce the cost!

 

Form the analysis above it is obvious that FR4 is the best selection to make PCBs in market. Some materials may be cheaper but it can only be used to make one-layer boards, and the reliability of the boards made by these materials is not good. So they are only used for one-layer and very simple boards.

Can my PCB don’t make solder mask for both side?

August 12th, 2016

Of course PCB can make no solder mask on both side, just make sure the solder mask layer (GTS& GBS) on your Gerber file is empty, or let us know you don’t want to make solder mask while quoting or before production, then we won’t make solder mask on both side, just print the circuits as you want.

Can make different solder mask thickness on top and bottom side?

August 12th, 2016

It’s okay to make different solder mask on top or bottom side only. Such as 50um on top side and 20um on bottom side. For 2 OZ board, the area without trace, solder mask thickness can be 40-50um, and after three or four times printing, developing, drying, the thickness of solder mask over copper trace can also reach up to 40-50um.

What is PCB Gerber file?

August 12th, 2016

The Gerber format is an open 2D binary vector image file format. It is the standard file used by printed circuit board (PCB) industry software to describe the printed circuit board images: copper layers, solder mask, legend, etc.

Gerber files should be inside a .rar or.zip archive with standard file extensions:
Extension                       Layer

  • pcbname.GTL                 Top Copper
  • pcbname.GTS                 Top Soldermask
  • pcbname.GTO                 Top Silkscreen
  • pcbname.GBL                 Bottom copper
  • pcbname.GBS                 Bottom Soldermask:
  • pcbname.GBO                 Bottom Silkscreen:
  • pcbname.TXT                  Drills
  • pcbname.GML/GKO        *Board Outline:
  • 4 layer board also need
  • pcbname.GL2                   Inner Layer2
  • pcbname.GL3                   Inner Layer3

Notes: Gerber file must be RS-274X format.  Drill file(pcbname.TXT) should be Excellon format.
PCB Outline is required.

Gerber file is used for manufacturing process.