Invention Grant
- Patent Title: High-dielectric sheet, a printed circuit board having the high-dielectric sheet and production methods thereof
- Patent Title (中): 高电介质片,具有高电介质片的印刷电路板及其制造方法
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Application No.: US13175683Application Date: 2011-07-01
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Publication No.: US08837160B2Publication Date: 2014-09-16
- Inventor: Takashi Kariya , Hironori Tanaka
- Applicant: Takashi Kariya , Hironori Tanaka
- Applicant Address: JP Ogaki-shi
- Assignee: Ibiden Co., Ltd.
- Current Assignee: Ibiden Co., Ltd.
- Current Assignee Address: JP Ogaki-shi
- Agency: Oblon, Spivak, McClelland, Maier & Neustadt, L.L.P.
- Priority: JP2005-300319 20051014
- Main IPC: H05K1/16
- IPC: H05K1/16 ; H01L21/48 ; H01L23/50 ; H01L23/498 ; H05K3/38 ; H05K3/46

Abstract:
A method of producing a capacitor for a printed circuit board includes producing high-dielectric sheets and selecting ones of the high-dielectric sheets, which are substantially free from a defect after the heat process. Each of the high-dielectric sheets is produced by providing a first electrode, forming a first sputter film on the first electrode, forming an intermediate layer on the first sputter film by calcining a sol-gel film, forming a second sputter film on the intermediate layer, and providing a second electrode on the second sputter film. The high-dielectric sheets are subjected to a heat process in which the high-dielectric sheets are subjected to a first temperature at least once and a second temperature higher than the first temperature at least once.
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