Patent US5254137A successfully refreshed from Google Patents.
US5254137A
Expired / Lapsed
US
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Method of producing chip-type solid-electrolyte capacitor
Assignee: NEC Corp
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Filing: 1991-10-29
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Granted: 1993-10-19
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Expires: 2011-10-29
Abstract
Abstract Disclosed is a method of producing a chip-type solid-electrolyte capacitor, in which the surface of a sheathing resin layer formed on an anode body is roughened by forming an irregularity thereon, and plated metal layers are formed on the surface thus roughened for an anode and cathode use. The metal layers are strongly adhered on the roughened surface. The surface-irregularity of the sheathing resin layer is produced by blasting hard particle material made of, for example, alumina or glass using a sandblast machine, or by irradiating a laser beam such as the YAG laser beam or the like.
Inventors
- 👤 Toshiyuki Mitani
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 08:51
CPC Classifications
H; H01; H01G; H01G9/00; H01G9/15; H01G9/004; H01G9/008; H01G9/012; H01G9/04; Y; Y10; Y10S; Y10S148/00; Y10S148/093; Y10S148/138
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
103 words
A method of producing a chip-type, solid-electrolyte capacitor comprising the steps of: providing a solid-electrolyte capacitor element having opposed top and bottom surfaces and a side surface extending therebetween; forming a sheathing resin layer on said top surface and said side surface of said capacitor element; roughening a surface area of said sheathing resin layer by using a laser beam under such irradiation concentrations as to be approximately 30 to 100 μm in spot diameter and approximately 0.2 Joule in output; forming a plated metal layer on said surface area after roughening thereof, and forming a solder layer on said plated metal layer.
Claim 2
Independent Claim
103 words
A method of producing a chip-type, solid-electrolyte capacitor comprising the steps of: providing a solid-electrolyte capacitor element having opposed top and bottom surfaces and a side surface extending therebetween; forming a sheathing resin layer on said top surface and said side surface of said capacitor element; roughening a surface area of said sheathing resin layer by using a laser beam under such irradiation concentrations as to be approximately 30 to 100 μm in spot diameter and approximately 0.2 Joule in output; forming a plated metal layer on said surface area after roughening thereof, and forming a solder layer on said plated metal layer.
Claim 3
Independent Claim
203 words
A method of producing a chip-type, solid-electrolyte capacitor comprising the steps of: providing a solid-electrolyte capacitor element having opposed top and bottom ends and a side surface extending therebetween; forming a sheathing resin layer on said top end and said side surface of said capacitor element; roughening selected side and top surface regions of said sheathing resin layer by using a laser beam, said top surface region being located on said top end of said capacitor element and said selected side surface regions being located on said side surface of said capacitor element, and one of said selected side surface regions being positioned next to said top surface region and another one of said selected side surface regions being placed adjacent to said bottom end of said capacitor element; forming a first plate metal layer on said top surface region after roughening thereof and on said one of said selected side surface regions after roughening thereof to provide an anode electrode; forming a second plated metal layer on said bottom end and on said another one of said selected side surface regions after roughening thereof to provide a cathode electrode; and forming solder layers on said first and second plated metal layers, respectively.
Claim 4
Independent Claim
203 words
A method of producing a chip-type, solid-electrolyte capacitor comprising the steps of: providing a solid-electrolyte capacitor element having opposed top and bottom ends and a side surface extending therebetween; forming a sheathing resin layer on said top end and said side surface of said capacitor element; roughening selected side and top surface regions of said sheathing resin layer by using a laser beam, said top surface region being located on said top end of said capacitor element and said selected side surface regions being located on said side surface of said capacitor element, and one of said selected side surface regions being positioned next to said top surface region and another one of said selected side surface regions being placed adjacent to said bottom end of said capacitor element; forming a first plate metal layer on said top surface region after roughening thereof and on said one of said selected side surface regions after roughening thereof to provide an anode electrode; forming a second plated metal layer on said bottom end and on said another one of said selected side surface regions after roughening thereof to provide a cathode electrode; and forming solder layers on said first and second plated metal layers, respectively.
Claim 5
Dependent Claim
42 words
The method of producing a chip-type solid-electrolyte capacitor as claimed in claim 2, wherein said laser beam is used under such irradiation conditions as to be approximately 30 to 100 μm in spot diameter and to be approximately 0.2 Joule in output.
Claim 6
Dependent Claim
42 words
The method of producing a chip-type solid-electrolyte capacitor as claimed in claim 3, wherein said spot diameter is approximately 50 μm and said laser beam is generated by a yttrium aluminum garnet (YAG) laser operating at a frequency of approximately 100 pulses/sec.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-10-18 | 1997-04-19 | 1997-10-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-10-18 | 2001-04-19 | 2001-10-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-10-18 | 2005-04-19 | 2005-10-19 | $7700.00 | Window Closed / Lapsed |