Filter base plate: brand - status T2/3003-H18.

Common specification: thickness 2.0-3.0 +-0.05 width: 0, +2.

Length: 0, +3 diagonal: <=3mm.

Common appearance benchmarks:

Aluminum alloy: not allowed to be polished, slight fine line of aluminum can be released;

Burr: the end of the base plate should not have the feel of the hand, obviously burr, the height must not exceed 0.3mm;

Black silk: not allowed to be polished, slight black silk does not affect the appearance of the release;

Laminating: flat, no bubble, crease phenomenon;

Scratch: do not allow, no feel does not affect the appearance of release;

Plate type: visual leveling, wave height should not exceed short side 0.3%;

Bare aluminum : not allow;

Luo Pit: not allow;

Layer: not allow;

Copper content deviation: +-1% (the proportion of copper layer is usually 10%, see the requirements of the card)

Other: batch defects inconsistent with normal, report to superiors;

Performance datum: peeling strength, folding and breaking unstratified;