Gallery View: PCB assemblies from China suppliers

China's PCB assemblies are based on single-, double-sided, multilayer, HDI, flexible, rigid-flex boards, and IC substrates.

PCB assembly manufacturers in China emphasize capability to complete projects based on various PCBs, from single- and double-sided to multilayer, HDI, flexible, rigid-flex boards and IC substrates. At present, about half of their turnout consists of units on multilayer PCBs with a low layer count, while those on single- and double-sided boards still have a significant portion.

Multilayer PCB assemblies represent about 60 percent of Leach (SZ) Co. Ltd's production. Wells Electronic Technology Ltd's mainstream selection uses 4 or 6-layer boards, while Shenzhen Jiubaba Electronics Co. Ltd offers models on single-sided to 8-layer PCBs.

Companies provide one-stop service, covering R&D, components procurement, production, testing, QC, assembly and aftersales support.

In terms of applications, major suppliers cater mainly to the 3C segment. Topscom Precision Industry Co. Ltd concentrates on products for automotive, industrial, medical, consumer electronics and telecom uses.

At Shenzhen Sanwin Technology Co. Ltd, the bulk of yield is for the industrial, instrumentation and automotive sector. Shenzhen Jiubaba focuses on the PCB assembly needs of semiconductor companies. Its output includes reference design, evaluation, functional validation, demo, prototyping and pilot production run boards.

Makers adopt PCBs, electronic components, soldering wire and paste, and adhesive from local providers. Some also turn to PCB suppliers overseas, mainly in Taiwan and Japan. A few manufacture boards in-house. Wells can produce 2 to 30-layer PCBs.

For ICs, the usual sources are domestic agents of key companies such as Atmel, Ti, Fairchild, Toshiba and STMicroelectronics. Some manufacturers maintain procurement offices abroad to be able to offer competitive prices and shorter delivery lead time. Topscom has such setups in Tokyo, Singapore and Hong Kong.

In spite of the rising labor cost, PCB assembly suppliers are expected to keep quotes at current levels until end-2016 to offset competition.

Here is a selection of PCB assemblies from China.

PCB assembly for intelligent control boards

This PCB assembly for intelligent control boards from Leach (SZ) Co. Ltd, Monok model, uses SMT. It undergoes automated optical inspection and functional testing, compliant with IPC-A-610 requirements. The unit meets RoHS.

The maker requires a minimum order of 5 units. Delivery lead time is 7 days. OEM/ODM services are provided.

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Turnkey PCB assembly

Shenzhen Jiubaba Electronics Co. Ltd provides turnkey PCB assembly services for prototype and low-volume production. The 988-01 model is an example. It uses BGA, micro BGA, QFN and other lead-less packages. The minimum order of 1 unit is delivered within 10 days. OEM and ODM orders are welcome.

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PCB assembly for CPU power control boards

Shenzhen Sanwin Technology Co. Ltd's model PCBA-SWCPU_1 PCB assembly for CPU power control boards consists of 0402 and 0805 components on a 2-layer FR-4 board with HASL surface finish. SMT is used.

The 180x90mm unit has multiple power control lines, and provisions for a manual switch or remote control. Price is $8.68.

The minimum order of 1 unit is delivered within 30 days.

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PCB assembly based on SMT, DIP

Topscom Precision Industry Co. Ltd's model Topscom-PCBA-160225001 PCB assembly is done using SMT and DIP, with programming and testing included. The unit is 100 percent inspected and tested during the DIP process. Production conforms to IPC-A-610 class 2.

OEM/ODM orders are welcome. There is no minimum order requirement.

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PCB assembly uses SMT, through-hole, BGA

Wells Electronic Technology Ltd employs SMT, conventional through-hole, PTH and BGA for this PCBA-S160219 model. The unit undergoes automated optical inspection, and in-circuit and functional testing. Manufacture follows the IPC-610 standard. The minimum order of 5 units is delivered within 15 days.

OEM/ODM services include fast turnaround prototyping, lead and lead-free production, and custom testing programs and fixtures. High-mix/low-volume orders are accepted.

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