Printed Circuit Board UL Certification
PCB can be divided into single-layer, double-layer, four-layer, six-layer and other multi-layer circuit boards according to the number of circuit board layers.
In the past ten years, China’s printed circuit board manufacturing industry has developed rapidly, with both the total output value and the total output. Due to the rapid development of electronic products, the price war has changed the structure of the supply chain. China has both industrial distribution, cost and market advantages, and has become an important printed circuit board production base.
So far, UL certification in the United States is an international product certification agency that certifies PCB and related industries. It is famous for testing the fire resistance and anti-shock performance of products. Its trust is irreplaceable in the entire circuit board industry.
PCB UL certification standard
UL796 Printed Wiring Board Standard
UL796 is a standard for PWB testing of printed circuit boards
UL94 Fire Test Standard
Flammability testing of plastic materials for instrument and equipment components. In UL94, the test methods for the fire test of laminates are specified, including horizontal fire and vertical fire.
Standard Test Methods 94V-0, 1, 2 (Vertical Burning), 94HB (Horizontal Burning), 94VTM-0, 1, 2 (Vertical Burning of Thin Materials).
UL746E printed circuit board substrate certification standard
For polymeric materials, industrial laminates, filament wound tubing, carbon fibers and printing board materials. The UL746E standard specifies the basic safety-related performance requirements and experimental methods of copper clad laminates.
UL746F flexible printed circuit board certification standard
UL746F is a test standard for flexible material interconnect structures PWBs.
UL common test items
Thermal shock test
Simulates soldering of printed circuit boards during component mounting. The treatment temperature is maintained at 121°C for 1.5 hours, then the sample is placed in the oven, and the temperature is set to the thermal shock temperature and time, eg, 260°C for 10 seconds.
It is required that the electroplating layer shall not be wrinkled, blistered or loose, and the substrate shall not be delaminated.
Coating firmness test
To test the firmness of the wire coating, use pressure-sensitive tape to stick on the wire sample without pretreatment and heat shock test. Requires no plating or wires stuck to the tape.
Coating connection strength and delamination test
The force per conductor width required to pull a conductor a certain distance from the substrate.
Vertical combustion test
First through the state of thermal shock. If green oil is required in production, an additional set of samples covered with green oil shall be provided.
The firmness test of conductive adhesive
Testing of glue-like conductors such as carbon, carbon paste, silver paste or other conductive materials on printed circuit boards. It is required that there shall be no evidence of removal of the conductor pattern after the test.
About Wonderful PCB
Shenzhen Wonderful Technology Co., Ltd. is China’s top model and small batch circuit board manufacturer. The company targets precision circuit board samples and small batches as the main target market. Since its establishment, it has adhered to the development concept of good quality and important reputation.
Invest huge sums of money to introduce advanced equipment, strictly regulate the operating standards and QC standards for incoming and outgoing materials, to ensure that the shipped products reach Seiko quality.
The self-developed ERP management system can realize the whole process of paperless operations such as online ordering, online payment, online production progress query, online logistics tracking, and online statistical report production, which greatly improves work efficiency.
It ensures that each order can be shipped quickly. After more than ten years of development, the company’s products and services have been well received by the market.
The company’s scale is developing rapidly, and the sample and small batch shipment capacity reaches 500 models/day. The products are widely used in communications, medical equipment, industrial control products, aviation, military products, testing instruments, automobiles, computers and other peripheral products.
We will continue to pay attention to customers, with efficient delivery speed and perfect after-sales service, to become the most trusted brand supplier in the PCB industry.
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