The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 22, 1992
Filed:
Nov. 16, 1990
Kenji Kushi, Hiroshima, JP;
Ken-ichi Inukai, Hiroshima, JP;
Takayuki Iseki, Hiroshima, JP;
Seiya Koyanagi, Hiroshima, JP;
Yasuyuki Fujimoto, Hiroshima, JP;
Mitsubishi Rayon Co., Ltd., Tokyo, JP;
Abstract
A photopolymerizing cross-linking hardenable resin composition is disclosed which is comprised of a binder resin, cross-linking monomer and photopolymerization initiator. The composition of each of the above mentioned components is such that dry film resist incorporating the resin composition of the present invention and used in processes for selective etching and plating of printed circuit boards can be developed in weak aqueous alkaline solution after selective exposure to light. In this way, the efficient and economical manufacture of high definition printed circuit boards is made possible. Additionally, dry film resist incorporating the photopolymerizing cross-linking hardenable resin composition of the present invention lends to easy handling and storage characteristics.