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Electric circuit board system classification
The automatic detection technology of the professional printed circuit board is applied with the introduction of surface mount technology, and the packaging density of the circuit board is rapidly increased.
PCBA board surface tin beads size acceptable standard
Acceptable standards for tin beads: 1. The diameter of the tin bead shall not exceed 0.13mm. 2. The number of tin beads with a diameter of 0.05mm-0.13mm in the range of 600mm2 shall not exceed 5 (single side).
Safety requirements between PCBA plate and shell
Safety distance includes electrical clearance (space distance), creepage distance (surface distance) and insulation penetration distance Electrical clearance: the shortest distance measured along the air between two adjacent conductors o...
What are the common types of PCBA substrates?
1. Fr-4 plate is an epoxy plate, with high mechanical properties and dielectric properties, better heat and moisture resistance, and good mechanical processing. 2. Aluminum substrate is a kind of metal substrate copper clad plate with go...
Electric circuit board assembly for sale
1. Component Hole Refers to the through hole inserted into the foot of the part on the board, the aperture of this foot hole is about 40 mil on average. Now after the prevalence of SMT, large aperture jacks have been gradually reduc...
Terms commonly used in PCB design
Refers to many small area circuit boards, in order to facilitate the downstream assembly line plug-ins, parts, welding and other operations, in the PCB manufacturing process, it is specially combined in a large board, for various proces...
