Standards for printed board drilling covers and pads published
Summary of content: The cover plate for printed board drilling and the pad plate for printed board drilling are beneficial to improve the quality of drilling and auxiliary materials that effectively protect the drill bit and the substrate of the printed board during the drilling of printed boards. The quality of the product directly affects the quality of the PCB drilling process, the yield, the reliability of the printed board, and the life of the drill. As there is no standard for PCB drilling cover and pads at home and abroad, there is no uniform technical standard for quality inspection and product acceptance of cover and pads used in PCB drilling processing in the industry. One of the issues of quality, reliability and development of the PCB industry.
CPCA organized experts to carry out investigations and combined with industry realities, put forward research and formulate industry standards for PCB drilling covers and pads with independent intellectual property rights in China. Make specific provisions on the inspection methods, inspection rules, packaging, marking storage and transportation requirements of common performance requirements for covers and pads in the industry to guide and standardize the production of PCB drilling covers, pads, research, and product inspections in the industry And acceptance, to promote the healthy development and quality improvement of the PCB industry and cover plates and pads.
In 2009, CPCA officially entrusted Shenzhen Liuxin Industrial Co., Ltd. as the team leader to study and formulate the standards for PCB drilling covers and pads. The standard numbers of "Board for PCB drilling" and "Board for PCB drilling" are CPCA 4402—2010 and CPCA 4403—2010, respectively. Promulgated and implemented.
CPCA standard "Board for drilling holes for printed boards" Classification of covers, appearance, dimensions (length, Width, thickness and tolerances, warpage, perpendicularity), physical properties (density, moisture content, surface hardness) and environmental properties (water absorption, formaldehyde release) requirements, inspection methods, inspection rules, packaging, marking, storage And transportation requirements.
Classification of CPCA standard "Board for drilling of printed boards", common boards in the industry (phenol paper laminated boards, melamine wood boards, composite wood boards, aluminum foil covers, double-sided bakelite Mat, UV wood mat, medium density wood fiber mat, high density wood fiber mat) appearance, size (length, width, thickness and tolerances, warpage, perpendicularity), physical properties (density, resistance Tensile strength, surface hardness), environmental properties (water absorption, formaldehyde release) and chemical properties (dimensional stability) requirements, inspection methods, inspection rules, packaging, marking, storage and transportation requirements have specified specific requirements.
It is expected that the release and implementation of the two standards will definitely play a positive role in promoting the development of the PCB industry and the development of cover plates and pads.