Source: http://www.google.com/patents/US5091212?dq=6760745
Timestamp: 2015-03-31 10:20:19
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Patent US5091212 - Applying electrode paste to selected portions of electronic surface through ... - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign inAdvanced Patent SearchPatentsDisclosed herein is a method of forming strip-shaped electrodes over an end surface of a plate-shaped electronic component and two major surfaces which are in series with the end surface. A slit plate, which is provided with through slits having width corresponding to the width of electrodes to be formed,...http://www.google.com/patents/US5091212?utm_source=gb-gplus-sharePatent US5091212 - Applying electrode paste to selected portions of electronic surface through slit of specified widthAdvanced Patent SearchPublication numberUS5091212 APublication typeGrantApplication numberUS 07/452,755Publication dateFeb 25, 1992Filing dateDec 19, 1989Priority dateDec 19, 1988Fee statusPaidAlso published asCA2005729A1, CA2005729C, DE3941917A1, DE3941917C2Publication number07452755, 452755, US 5091212 A, US 5091212A, US-A-5091212, US5091212 A, US5091212AInventorsNorio Sakai, Kenji Minowa, Shinji MorihiroOriginal AssigneeMurata Manufacturing Co., Ltd.Export CitationBiBTeX, EndNote, RefManPatent Citations (9), Referenced by (4), Classifications (22), Legal Events (4) External Links: USPTO, USPTO Assignment, EspacenetApplying electrode paste to selected portions of electronic surface through slit of specified width
US 5091212 AAbstract
Disclosed herein is a method of forming strip-shaped electrodes over an end surface of a plate-shaped electronic component and two major surfaces which are in series with the end surface. A slit plate, which is provided with through slits having width corresponding to the width of electrodes to be formed, is located above an electrode paste bath while an electronic component is arranged above the slit plate so that its end surface extends across the through slits. Before or after this step, the electrodes paste is made to swell to a constant level beyond the upper surface of the slit plate, thereby applying the electrode paste to the end surface of the electronic component and the two major surfaces which are in series with the end surface in the form of strips.
1. A method of forming an electrode on a selected portion of at least one surface of an electronic component, comprising the steps of:preparing a slit plate provided with a through slit having width corresponding to the width of the electrode to be formed; preparing a bath of electrode paste for forming the electrode; locating said slit plate above said electrode paste bath; arranging said electronic component in close proximity above said slit plate so that said portion of said surface to be provided with an electrode extends across said through slit; and bringing said electrode paste bath to such a level that said electrode paste passes through said through slit to reach substantially only said selected portion of said surface to be provided with an electrode; thereby applying said electrode paste passing through said through slit substantially only to said selected portion of said surface to be provided with an electrode. 2. A method in accordance with claim 1, wherein said step of preparing said electrode paste bath includes a step of storing said electrode paste in a container having an opening upper surface, and said step of locating said slit plate above said electrode paste bath includes a step of arranging said slit plate to close said upper surface of said container.
3. A method in accordance with claim 2, wherein said step of bringing said electrode paste bath to a level reaching said surface to be provided with an electrode includes a step of pressurizing the interior of said container.
4. A method in accordance with claim 2, wherein said step of bringing said electrode paste bath to a level reaching said surface to be provided with an electrode includes a step of decompressing the exterior of said container.
5. A method in accordance with claim 1, wherein said electronic component has a flat end surface and an opposite pair of major surfaces which are in series with said end surface through opposite edges of said end surface, and said electrode is formed to extend at least from one edge to another edge of said end surface.
6. A method in accordance with claim 5, wherein said electrode is formed to extend toward parts of said major surfaces in addition to said end surface.
7. A method in accordance with claim 1, wherein said electronic component has a rounded end surface, and said electrode is formed at least on said end surface.
8. A method in accordance with claim 1, wherein said step of bringing said electrode paste bath to a level reaching said surface to be provided with an electrode is carried out after said step of arranging said electronic component above said slit plate.
9. A method in accordance with claim 1, wherein said step of bringing said electrode paste bath to a level reaching said surface to be provided with an electrode is carried out in advance of said step of arranging said electronic component above said slit plate.
Further, the electrode parts 2a, 2b and 2c of the electrodes 2 must be formed in different steps respectively. In order to carry out these steps, it is necessary to transfer the electronic components 1 from the holder 10 or the clamp member 15 to the holder 12 and to turn over the same within the holder 12, while drying steps are required after the steps of printing the electrode parts 2a, 2b and 2c respectively. Thus, the operation for printing the electrodes 2 is extremely inefficient.
Each electrode 2 is formed by separately printing the three electrode parts 2a, 2b and 2c, and hence the electrode part 2a may deviate from the electrode part 2b and/or the electrode part 2c (not shown), as shown in FIG. 17. Such deviation will be further promoted if the screen is expanded or damaged as hereinabove described, for example. The screen may be also expanded or damaged when the same is used over a long period of time.
According to the present invention, a large number of electronic components 1 may be arranged on the slit plate to form electrodes, in order to enable multiple processing.
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