San-ei Kagaku Co., Ltd.

Kita-ku, Tokyo, Japan Unknown Japanese, English Founded 1959 Official site

Specialty chemical maker of permanent via-plugging inks used on MPU package substrates and HDI boards so plated-over vias can be rebuilt as a flat surface.

Core capabilities

Permanent hole-plugging inks for PTH and laser BVH
Undercoat inks for printed wiring boards
One-component thermoset fill with stated high-Tg / low-CTE grades

Related capability assets

Permanent via-plugging ink for package-substrate through-holes and laser BVH

One-component thermoset ink that fills plated through-holes and laser blind vias on MPU package and HDI boards so the surface can be cap-plated and treated as via-free.