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:
Aug. 21, 2007
Filed:
Jan. 16, 2003
Isao Tsukagoshi, Tokyo, JP;
Yasushi Gotou, Shimodate, JP;
Masami Yusa, Tsukuba, JP;
Yasuo Miyadera, Tsukuba, JP;
Isao Tsukagoshi, Tokyo, JP;
Yasushi Gotou, Shimodate, JP;
Masami Yusa, Tsukuba, JP;
Yasuo Miyadera, Tsukuba, JP;
Hitachi Chemical Co., Ltd., Tokyo, JP;
Abstract
An adhesive film including a reactive adhesive capable of curing by heating or light irradiation and a polyphthalide represented by the formula I: wherein R represents a divalent aromatic hydrocarbon group or a divalent heteroring-containing aromatic group, Rrepresents an alkyl group, a Fluorinated alkyl group, an alkoxy group or a halogen atom, where the number of Ris 0 to 4, X represents O or N—R, provided that Rrepresents one of the following groups, Y represents SOor CO and n represents a number of repeating units in the polymer. The adhesive film can be used to connect, e.g., electrodes of a semiconductor chip to electrodes of a wiring board. The polyphthalide can be used to surface-treat, e.g., electrodes of a wiring board.