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:
Feb. 23, 2021
Filed:
Feb. 02, 2018
Dow Corning Toray Co., Ltd., Tokyo, JP;
Ryosuke Yamazaki, Chiba, JP;
Kazuhiro Nishijima, Chiba, JP;
Tomohiro Iimura, Chiba, JP;
Manabu Sutoh, Chiba, JP;
Abstract
The present invention pertains to a curable organopolysiloxane composition comprising at least (A) an organopolysiloxane having at least two alkenyl groups per module, (B) an organopolysiloxane resin represented by average unit formula: (RSiO)(RSiO)(RSiO)(SiO). In the formula, R's are the same or different from each other, and represent a hydrogen atom or a monovalent hydrocarbon group not having an aliphatic unsaturated carbon bond but at least two of the R's per molecule represent hydrogen atoms, Rrepresents a monovalent hydrocarbon group not having an aliphatic unsaturated bond, and a, b, and c are numbers satisfying 0<a<1, 0<b<1, and 0≤c≤0.2, and 0<d<1, respectively, but are also numbers satisfying 0.6≤a/d 1.5, 1.5≤b/d≤3, and a+b+c+d=1, and (C) a catalyst for hydrosilylation reaction. This composition has excellent adhesiveness to a semiconductor element, and can form a cured product in which only a small number of bubbles are produced.