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:
Jul. 14, 2009
Filed:
May. 01, 2006
Masaki Tokioka, Kanagawa, JP;
Hiroharu Ueda, Kanagawa, JP;
Mitsutoshi Hasegawa, Kanagawa, JP;
Tokutaka Miura, Kanagawa, JP;
Masaki Tokioka, Kanagawa, JP;
Hiroharu Ueda, Kanagawa, JP;
Mitsutoshi Hasegawa, Kanagawa, JP;
Tokutaka Miura, Kanagawa, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A joining material like an In film having a low melting point forms a surface oxide film when melted. If the oxide film is thick, an uneven surface shape will remain as it is, and can cause vacuum leakage during vacuum sealing. This problem is solved, for example, by placing particles of a refractory material inside the low melting joining material. The particles of the refractory material serve as a holding member for the low melting material and break the oxide film during a joining operation to bring the seal bonding with the low melting material to perfection.