| 摘要 |
PURPOSE:To obtain a substrate for inspection of smear removing treatment easily by a method wherein an intermediate layer base, on which a predetermined copper foil pattern is formed, is pressure laminated on both surfaces of a resin board base in order to form a multilayer substrate, and layers are laminated in order to make a multilayer structure in a manner a prepreg laps over at least one side of the substrate, after which a through-hole penetrating the multilayer substrate and the prepreg is formed. CONSTITUTION:On a substrate table 15, a prepreg 12A, a multilayer substrate 11A for forming an inspection substrate for smear removing treatment, a prepreg 12B, a multilayer substrate 11B, and a prepreg C are laminated in order. These prepregs and the multilayer substrate are fixed to the substrate table 15 with pins 16. Then, a through-hole 13 is formed penetrating the multilayer substrates 11A and 11B is formed in a predetermined position by use of a drill 14. Thus, the through-hole 13 is formed while semi-curable prepregs 12A, 12B, and 12C of sheet form are wound on a blade of the frill 14, so that a great quantity of smear is sufficiently formed inside the through-hole. If the diameter of the drill 14 is 0.5mm-0.6mm, a rotation speed of 8X10<4>-1X10<5>/rpm and a feeding speed of 1X10<3>-1.5X10<3>mm/min are most effective for generating smear. |
