Dear ,
Good day.
This is a courtesy email to let you know that in order to obtain the ideal signal quality and transmission characteristics, high speed USB2.0 device usually requires the stacked layers of PCB is at least 4 layer. An option can be selected is Signal-GND-VCC-Signal. For a simple USB bus, it also can be designed as double sided.
Here's an example of 90 ohm differential impedance controlled PCB for USB.
1) FR-4 TG>130
2) 17.5um initial copper, 1.1mm finished thick
3) L1/L2 30/10 mil 90 ohm+/-10%
4) Immersion gold finish
5) Stack up
---------- OVERLAY (TOP) .GTO
--- ---------- SOLDER MASK (TOP) .GTS
| ---------- LAYER 1 (TOP LAYER) .GTL
1.1mm DIELECTRIC (FR-4 core)
| ---------- LAYER 2 (BOTTOM LAYER) .GBL
--- ---------- SOLDER MASK (BOTTOM) .GBS
If you have requirement on these PCB's, please reply back to this email or following contact by your gerber files and we will get back to you asap.
Christina Lau | Business development
Bicheng PCB |(86-755-21949341 | www.bicheng-pcb.com | sales10@bicheng-pcb.com
If you do not want to receive emails from Bicheng about marketing communications, reply as "remove" in the subject line.
Bicheng is located at Baoan, Shenzhen, China 51803.
6号信2： Micro BGA PCB
Dear ,
Good day.
This is a courtesy email to let you know that printed circuit boards with ball-grid array(BGA) can be found in many interconnection pins devices such as microprocessors, communication equipment and Control industrial machinery etc.
| Our capabilty | | | Minimum diameter of BGA pad (measured in mils) | | | Prototype | 10 | Small volume | 12 | Volume production | 12 |
| | | | | | Minimum diameter of pad via (measured in mils) | | | Prototype | 16 | Small volume | 16 | Volume production | 20 |
| |
| | |
Our PCB Products and services
* FR-4 TG>135, High TG170, High CTI 600V
* MCPCB 1W/MK- 3W/MK thermal conductivity
* RO4350B, RO4003C material
* Rogers Multi-layer PCB
* Quick turn around (QTA) prototypes
* Double sided and Multi-layer PCB
* HASL lead free, ENIG, Immersion Silver, Immersion tin.
* Prototype to Small batch and volume production
* Door to door shipment service
* No minimum order quantity(MOQ) required
If you have requirement on the PCB's, please reply back to this email or following contact by your gerber files and we will get back to you asap.
Christina Lau | Business development Bicheng PCB |(86-755-21949341 | www.bicheng-pcb.com | sales10@bicheng-pcb.com If you do not want to receive emails from Bicheng about marketing communications, reply as "remove" in the subject line. Bicheng is located at Baoan, Shenzhen, China 51803. | | |
6号信3，RO4350B 30mil (0.762mm) PCB
Dear ,
Good day.
This is a courtesy email to let you know that Bicheng company has been providing RO4350B 30mil (0.762mm) PCB's for the application of anntena, mixer, duplexer etc.
RO4350B PCB in 4 way dividers
PCB dimension: | 122 x 92mm=1PCS |
Basic stack up: | 2 Layer PCB |
| copper ------- 35um(1oz)+plate TOP layer |
| RO4350B 30mil (0.762mm) |
| copper ------- 35um(1oz)+plate BOT Layer |
Minimum trace and space | 11.97mil |
Minimum / maximum holes | 0.3/2.8mm |
Number of different holes | 2 |
Number of drill holes | 195 |
Number of milled slots | 0 |
Material: | RO4350B 30mil (0.762mm) |
Surface finish: | Immersion gold (2 micro inches) 190% area |
Solder mask: | NO |
Contour: | rout (mill) |
Via: | plated through hole(PTH) |
Final height of PCB | 0.8-0.9mm ±0.1 |
If you have requirement on high frequency PCB's, please reply back to this email or following contact by your gerber files and we will get back to you asap.
Christina Lau | Business development
Bicheng PCB |(86-755-21949341 | www.bicheng-pcb.com | sales10@bicheng-pcb.com
If you do not want to receive emails from Bicheng about marketing communications, reply as "remove" in the subject line.
Bicheng is located at Baoan, Shenzhen, China 51803.
6号信4：Double sided PCB
Dear ,
Good day.
This is a courtesy email to let you know that Bicheng Company provides 5 types of double sided PCB's for electronics industry which is in the application of consumer electronics, audio electronics, office electronics, portable electronics, Safety and surveillance, Batteries & chargers and lighting products etc.
Our PCB's
(1) FR-4 material (The most common used today)
Normal TG, High TG 170, High CTI 600V
Material(CCL) Brand: ITEQ, SHENGYI, KB
(2) High frequency material
RO4350B, RO4003C
F4B series from China Brand
(3) Insulated Metal Substrate (IMS) PCB, typical stack-up as follows
L1---Copper conductor
PP---dielectric material
L2---copper conductor
PP---dielectric material
AL---aluminum base
(4) Metal core PCB (MCPCB), typical stack-up as follows
L1---copper conductor
PP---dielectric material
AL---aluminum core
PP---dielectric material
L2---copper conductor
(5)Polyimide material (Flexible PCB)
SERVICE TYPE
Prototypes, Quick-turn prototype PCB, medium volume and large production.
If you have requirement on PCB's, please reply back to this email or following contact by your gerber files and we will get back to you asap.
Christina Lau | Business development
Bicheng PCB |(86-755-21949341 | www.bicheng-pcb.com | sales10@bicheng-pcb.com
If you do not want to receive emails from Bicheng about marketing communications, reply as "remove" in the subject line.
Bicheng is located at Baoan, Shenzhen, China 51803.
6号信5，Overview of multilayer PCB
Dear ,
Good day.
This is a courtesy email to let you know that multilayer PCB's represent one of the most complicated products in the PCB industry.
The purpose of multilayer PCB
* to accommodate a larger number of interconnection caused by increasing use of high pin-count IC's.
* to establish an electrical performance of voltage and ground planes, EMC-shielding and circuit speed etc.
The process of multilayer PCB
A) In general, a multilayer board consists of a number of very thin print-and-etch innerlayers, but drilling of holes has not been carried out. Outerlayers of the multilayer board remain unetched.
B) Layers from top to bottom are bonded together in close registration by means of thin plies of prepreg. The bonding is performed under close temperature and pressure control in a lamination press.
C) After lamination, they are the processed in very much the same way as an ordinary double-sided PTH boards, i.e. holes are drilled, cleaned and plated. Outerlayers are etched to develop the circuit pattern. Solder masks are applied and solder coating (HAS, ENIG etc) is performed.
If you have requirement on multilayer PCB's, please reply back to this email or following contact by your gerber files and we will get back to you asap.
Christina Lau | Business development
Bicheng PCB |(86-755-21949341 | www.bicheng-pcb.com | sales10@bicheng-pcb.com
If you do not want to receive emails from Bicheng about marketing communications, reply as "remove" in the subject line.
Bicheng is located at Baoan, Shenzhen, China 51803.
