Patent ID: 6645297
Filing Date: 2003-11-11
Classification: B05C,H05K

Abstract:
A roll coater for forming an interlaminar resin insulating layer and/or a solder resist layer in the manufacture of a printed circuit board comprising a substrate and, as serially built up thereon, a conductor layer and an interlaminar resin insulating layer in an alternate fashion and in repetition, with a solder resist layer formed on top of the resulting multilayer structure, which roll coater comprising a roll having a surface formed with a multiplicity of grooves running in the direction of roll rotation, with the depth of the grooves in both end marginal areas of said roll surface being relatively reduced as compared with the depth of the grooves in the remaining area, the depth of the grooves in the outermost regions of said marginal areas being 10 to 50% less than the depth of the grooves in the other region the width of the roll surface where the depth of grooves is relatively reduced as compared with the remaining area is not greater than 5 cm and both edges of said roll coater comprising a guide at each end of the roll.