Invention Grant
- Patent Title: Laser-irradiated metallized electroceramic
- Patent Title (中): 激光照射金属化电瓷
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Application No.: US10885877Application Date: 2004-07-08
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Publication No.: US07318844B2Publication Date: 2008-01-15
- Inventor: Reto Kessler , Felix Greuter , Michael Hagemeister
- Applicant: Reto Kessler , Felix Greuter , Michael Hagemeister
- Applicant Address: CH Zurich
- Assignee: ABB Research Ltd
- Current Assignee: ABB Research Ltd
- Current Assignee Address: CH Zurich
- Agency: Buchanan Ingersoll & Rooney PC
- Priority: EP03405554 20030721
- Main IPC: B23K26/00
- IPC: B23K26/00 ; H01L21/00 ; H01L21/20

Abstract:
The manufacturing method for an electroceramic component (1), for example a varistor (1), comprises a laser irradiation of a part (5; 6) of the surface of an electroceramic body (2) before a metallization (3; 4) is applied to the part (5; 6) of the surface. By means of the laser irradiation it is possible to produce a micro-roughness and/or a chemical modification of the surface which permits good adhesion of the metallization, and it is possible to reduce or eliminate areas of unevenness or waviness of that part (5; 6) of the surface of the electroceramic body (2) which is to be metallized. In addition, improved transverse conductivity can be produced, by virtue of which a low contact resistance and a very homogeneous current distribution is achieved, in particular near to the metallization (3; 4). In addition it is possible to remove residues which originate in particular from a sinter support or from the application of a passivation layer. After the laser irradiation, the electroceramic body advantageously has a border (9) which adjoins the part (5; 6) of the surface and which is not laser-irradiated. The laser beam can advantageously be pulsed and focused.
Public/Granted literature
- US20050016969A1 Laser-irradiated metallized electroceramic Public/Granted day:2005-01-27
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