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:
Jun. 09, 1998
Filed:
May. 03, 1996
Kenzo Tsujimoto, Wakayama, JP;
Yoshiharu Ayabe, Wakayama, JP;
Fujihisa Matsunaga, Wakayama, JP;
Ikuzo Nishiguchi, Hirakata, JP;
Yoshio Ishino, Kyoto, JP;
Honshu Chemical Industry Co., Ltd., Tokyo, JP;
Osaka Municipal Government, Osaka, JP;
Abstract
A method of producing styrene derivatives expressed the general formula (2) by reacting a benzaldehyde derivative expressed by the general formula (1) with dibromomethane under the existence of zinc metal as well as an active chloride for producing various types of oxystyrene which are polymerized monomers as a photoresist material used in a high density integrated circuit process from easily available materials which also can easily be handled: ##STR1## (wherein R indicates a an alkyl group, alkoxyalkyl group, an alkylcarbonyl group, an alkoxycarbonyl group, a 5 or 6-atom heterocylclic groups, or an alkylsilyl group); ##STR2## (wherein R indicates any of the same substituents as those described above.)