Mitsubishi Gas Chemical Company, Inc.

Mitsuo Ejiri

Morio Gaku

Nobuyuki Ikeguchi

Hidenori Kimbara

Toshihiko Kobayashi

Takuya Hasaki

Hidenori Kinbara

Shinya Komatsu

A lubricant sheet suitable for use in a process of drilling a laminate or a plastic board, comprising a metal foil or an organic film, and a lubricant resin composition layer or a primer layer and the lubricant resin composition layer, the lubricant resin composition layer or the primer layer and the lubricant resin composition layer being formed on at least one surface of the metal foil or the organic film, wherein at least one layer of the primer layer and the lubricant resin composition layer contains a colorant, and a drilling method using the above lubricant sheet.

Lubricant sheet for drilling and method of drilling

A method of drilling a through-hole for inter-surface conduction in a laminate for a printed wiring board, in which the heat generation in a drill bit can be inhibited in drilling holes, quality holes can be highly efficiently made in the presence, on the laminate surface, of a novel water-soluble lubricant sheet which has high strength and can be handled easily, the method comprising drilling the through-holes in the presence of a water-soluble lubricant sheet which has a thickness of 0.02 to 3 mm and is formed from a mixture of 20 to 90% by weight of a polyether ester with 10 to 80% by weight of a water-soluble lubricant.

Method of drilling a hole for printed wiring board

A process for producing a curable resin liquid comprising: (a) at least one cyanate ester compound and (b) at least one polyfunctional maleimide compound, characterized in that the process comprises:

Process for producing curable resin composition from cyanate ester and

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Tokyo, Japan

Mitsuo Ejiri