Patent ID: 11937365
Assignee: TATSUTA ELECTRIC WIRE & CABLE CO., LTD.
Field: Surface technology, coating (Chemistry)
Classification: CPC H  B  C | IPC H

Claim 4:
5. An affixation film for a printed wiring board, comprising:
a circuit pattern concealing layer; and
an adhesive layer put on top of the circuit pattern concealing layer,
wherein an opposite surface of the circuit pattern concealing layer from the adhesive layer has an Sku of 1.8-4.0, and
wherein the opposite surface of the circuit pattern concealing layer from the adhesive layer has a Vmc of 2.0-3.0 mL/m2, where an areal material ratio at which protruding hills are separated from a core is 10%, and an areal material ratio at which protruding dales are separated from a core is 80%.