1. Design rule checking (DRC)
Design rule checking (DRC) is an area of electronic design automation, which determines whether the physical layout of a specific chip layout meets a series of recommended parameters called design rules. Design rule checking is a main step in the process of physical verification and sign off. It also includes LVS (layout and schematic diagram) checking, XOR checking, ERC (electrical rule checking) and antenna checking. For advanced processes, some factories also adhere to stricter rules to improve the yield. In particular, it is recommended to check the batch pattern design rules before generating the final process drawing.
After wiring, we suggest that computer-aided DRC check should be done to reduce design errors and improve PCB yield. Click Tools / design rule check to display the following interface.
2. The capability of process
please view the process capability of PCB and the process capability of SMT .
3. RoHs Lead Free
RoHS is a compulsory standard formulated by EU legislation. Its full name is "restriction of hazardous substances". The standard has been formally implemented since July 1, 2006. It is mainly used to standardize the material and process standards of electronic and electrical products, making it more conducive to human health and environmental protection. The purpose of the standard is to eliminate six substances in electrical and electronic products, including lead, mercury, cadmium, hexavalent chromium, polybrominated biphenyls and polybrominated diphenyl ethers, and the content of cadmium should not exceed 0.01%.
RoHS aims at electrical and electronic products that may contain the above six harmful substances in all production processes and raw materials, mainly including: white appliances, such as refrigerators, washing machines, microwave ovens, air conditioners, vacuum cleaners, water heaters, etc., black appliances, such as audio and video products, DVD, CD, TV receivers, it products, digital products, communication products, etc.; electric tools, electric Electronic toys, medical electrical equipment.
3.1. Examples of lead (PB) using the substance: solder, glass, PVC stabilizer
3.2. Mercury (Hg) (mercury) examples of using the substance: temperature controller, sensor, switch and relay, bulb
3.3. Cadmium (CD < g é >) examples of using the substance: switch, spring, connector, shell and PCB, contact, battery
3.4. Hexavalent chromium (Cr 6 + < g è >) example of using the substance: metal anti-corrosion coating
3.5. Examples of PBBs using the substance: flame retardant, PCB, connector, plastic shell
3.6. Examples of PBDE use: flame retardant, PCB, connector, plastic shell
The following are the upper limit concentrations specified for six hazardous substances in RoHS:
Cadmium: less than 100ppm
Lead: less than 1000ppm
Less than 3500ppm in steel alloy
Less than 4000ppm in aluminum alloy
Less than 40000 ppm in copper alloy
Mercury: less than 1000ppm
Hexavalent chromium: less than 1000ppm
PCBBay provides service of manufacture printed circuit boards without lead for surface finish that requires rigorous concentration of 6 hazardous substances including Lead (Pb), Mercury (Hg), Cadmium (Cd), Hexavalent Chromium (CrVI), Polybrominated Biphenyls (PBB) and Polybrominated Diphenyl Ethers (PBDE). Among the 6 types of substances, lead is the most widely applied in the electronic plating. Therefore, lead-free is the best way for surface finish of PCB.
this is our Certificate of RoHs.
The PCB surface finish can be chosen by customers. In addition to HASL lead free, the following lead-free solutions are also available for PCB:
Immersion Gold (ENIG)
Immersion Silver
Immersion Tin
Hard Gold
OSP
you can choose one of lead-free solutions .
4. PCB UL Certification
UL is a shorthand for Underwriters Laboratories Inc. UL safety test institute is the most authoritative organization in the United States, and also a large non-governmental organization engaged in safety test and appraisal in the world .It is an independent, for-profit, professional organization that does experiments for public security. UL certification in the United States is a non mandatory certification, mainly for testing and certification of product safety performance, and its certification scope does not include the EMC (electromagnetic compatibility) characteristics of products.
UL Mark is the most widely accepted proof that a product meets American and Canadian safety requirements. For American consumers, the UL Mark is a recognized symbol of product safety.
View UL certification of PCBBay
All printed circuit boards made by PCBBay are manufactured using a UL 796 certified process according to ZPMV2. These printed circuit boards can be used into UL approved products.
Tel：+086 13662663653 
Skype: wendy_lee886
Wechat: wx13662663653
WhatsApp: +86 136 6266 3653
Email:support@PCBBay.com
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