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:
Nov. 22, 2011
Filed:
Oct. 27, 2003
Akira Nakashima, Fukuoka, JP;
Miki Egami, Fukuoka, JP;
Michio Komatsu, Fukuoka, JP;
Yoshihiro Nakata, Kanagawa, JP;
Ei Yano, Kanagawa, JP;
Katsumi Suzuki, Toyota, JP;
Akira Nakashima, Fukuoka, JP;
Miki Egami, Fukuoka, JP;
Michio Komatsu, Fukuoka, JP;
Yoshihiro Nakata, Kanagawa, JP;
Ei Yano, Kanagawa, JP;
Katsumi Suzuki, Toyota, JP;
JGC Catalysts and Chemicals Ltd., Kanagawa, JP;
Fujitsu Limited, Kanagawa, JP;
Abstract
The present invention relates to a coating liquid for forming an amorphous silica-based coating film with a low dielectric constant of 2.5 or below and the Young's modulus of 6.0 GPa or more and having excellent hydrophobic property, and to a method of preparing the same. The coating liquid may contain a silicon compound obtained by hydrolyzing tetraalkyl ortho silicate (TAOS) and specific alkoxysilane (AS) in the presence of tetraalkyl ammonium hydroxide (TAAOH), or may contain a silicon compound obtained by hydrolyzing or partially hydrolyzing tetraalkyl ortho silicate (TAOS) in the presence of tetraalkyl ammonium hydroxide (TAAOH), mixing the reaction product with specific alkoxysilane or a hydrolysate or a partial hydrolysate thereof, and hydrolyzing all or a portion of the mixture according to the necessity. In addition, the coating liquid is prepared by mixing components described above at a specific ratio and under specific process conditions.