T/CPCA 4403-2010 Drilling board spacer for printed circuit board
T/CPCA 4403-2010 Drilling board spacer for printed circuit board
Basic Information
Scope
Scope: This standard specifies the classification, requirements, inspection methods, inspection rules, packaging, marking, transportation, and storage requirements for spacers used in drilling printed circuit boards. This standard applies to spacers used in drilling printed circuit boards; Main technical content: This standard specifies the classification of spacers, the appearance and dimensions (length, width, thickness and their tolerances, warpage, verticality) of commonly used spacers in the industry (phenolic paper laminated spacers, melamine wood spacers, composite wood spacers, aluminum foil cover plates, double-sided glued wood spacers, UV wood spacers, medium-density wood fiber spacers, high-density wood fiber spacers), physical properties (density, tensile strength, surface hardness), environmental performance (water absorption, formaldehyde emission), and chemical properties (dimensional stability), as well as inspection methods, inspection rules, packaging, marking, storage, and transportation requirements.