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. 22, 2011
Filed:
Sep. 15, 2008
Takeshi Eriguchi, Chiyoda-ku, JP;
Hiromasa Yamamoto, Chiyoda-ku, JP;
Kaori Tsuruoka, Chiyoda-ku, JP;
Takeshi Eriguchi, Chiyoda-ku, JP;
Hiromasa Yamamoto, Chiyoda-ku, JP;
Kaori Tsuruoka, Chiyoda-ku, JP;
Asahi Glass Company, Limited, Tokyo, JP;
Abstract
To provide a negative photosensitive fluorinated aromatic resin composition having a low relative permittivity, low water absorptivity, high heat resistance and high productivity. A negative photosensitive fluorinated aromatic resin composition comprising the following fluorinated aromatic prepolymer, a photosensitizer and a solvent. Here the fluorinated aromatic prepolymer is a fluorinated aromatic prepolymer which is obtained by subjecting either one or both of a compound (Y-1) having a crosslinkable functional group (A) and a phenolic hydroxyl group, and a compound (Y-2) having a crosslinkable functional group (A) and a fluorinated aromatic ring, to a condensation reaction in the presence of a HF-removing agent, with a fluorinated aromatic compound (B) represented by the following formula (1): (wherein n is an integer of from 0 to 3, each of a and b which are independent of each other, is an integer of from 0 to 3, each of Rfand Rfis a fluorinated alkyl group having at most 8 carbon atoms, and F in the aromatic ring represents that hydrogen atoms of the aromatic ring are all substituted by fluorine atoms), and a compound (C) having at least 3 phenolic hydroxyl groups, and which has crosslinkable functional groups (A) and ether bonds and has a number average molecular weight of from 1×10to 5×10.