Electricity: conductors and insulators – Conduits – cables or conductors – Preformed panel circuit arrangement
Reexamination Certificate
2005-08-23
2005-08-23
Cuneo, Kamand (Department: 2841)
Electricity: conductors and insulators
Conduits, cables or conductors
Preformed panel circuit arrangement
C174S256000, C361S795000, C428S209000
Reexamination Certificate
active
06933448
ABSTRACT:
A printed circuit board having a permanent solder mask includes a substrate made of a glassfiber reinforced epoxy resin material. The top and bottom surfaces of the substrate are disposed thereon a conductive pattern respectively. An epoxy resin solder mask is coated on each surface of the substrate in such a way that the conductive pattern is divided into a sheltered portion covered by the solder mask and an unsheltered portion exposed outside. The solder mask also has an even and smooth outer surface with a micro-roughness ranging between 0.5 μm˜10 μm and an optimum thickness ranging between 2 μm˜200 μm.
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Chih Wan-Kuo
Maa Chong-Ren
Tsai Ming-Sung
Browdy and Neimark , P.L.L.C.
Cuneo Kamand
Dinh Tuan
S & S Technology Corporation
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