Green sheet, manufacturing method thereof and slurry composition for forming green sheet

A manufacturing method and composition technology, applied in the field of green sheet, its manufacture and slurry composition for forming green sheet, can solve problems such as unevenness, cracks or wrinkles, and achieve the effect of excellent surface shape and good peelability

Inactive Publication Date: 2009-01-21
NITTETABU MINING CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] However, in these green sheets, there is a problem that unevenness, cracks, or wrinkles are generated on the surface.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] Add boroaluminosilicate glass with an average particle size of 2.5 μm produced by Matsunami Glass Co., Ltd. 100 g of the powder and 2 g of the polyol-based dispersant SN70 manufactured by Sunopco Co., Ltd. were stirred and mixed in a ball mill for 1 hour to obtain a dispersion 1 . To the dispersion 1 in the ball mill, 10 g of acrylic resin YB-881S produced by Yuken Industry Co., Ltd. and 3 g of DOA produced by Daihachi Chemical Industry Co., Ltd. were added, and mixed for 24 hours to obtain slurry 1. The slurry had a viscosity of 3400 cps at 20°C.

[0056] This slurry 1 is coated on Lumina film (trade name is Lumina one, it is a kind of polyethylene terephthalate film) with bar coater, make thickness be 0.6mm (below The same thickness was used in Examples and Comparative Examples) and dried at 20° C. for 8 hours to obtain a green sheet GS1.

[0057] Adhesion was evaluated by holding both ends of the green sheet with both hands and vibrating it up and down. The propert...

Embodiment 2

[0067] Add boroaluminosilicate with an average particle size of 2.5 μm produced by Matsunami Glass Co., Ltd. to a mixed solvent consisting of 14 g of acetone, a low-boiling point (57°C) solvent, and 31 g of ethyl cellosolve, a high-boiling point (135°C) solvent 100 g of salt glass powder and 2 g of nonionic dispersant SN70 manufactured by Sunnopco Co., Ltd. were stirred and mixed in a ball mill for 1 hour to obtain a dispersion 4 . To the dispersion 4 in the ball mill, 10 g of acrylic resin YB-881S produced by Yuken Industry Co., Ltd. and 3 g of DOA produced by Daihachi Chemical Industry Co., Ltd. were added and mixed for 24 hours to obtain slurry 4. The slurry had a viscosity of 2000 cps at 20°C.

[0068] This slurry 4 was coated on a Luminar film with a bar coater, and dried at 20° C. for 8 hours to obtain a green sheet GS4.

[0069] As the table shows, this GS4 is in very good shape.

Embodiment 3

[0079] Add boroaluminosilicate glass with an average particle size of 2.5 μm produced by Matsunami Glass Co., Ltd. 100 g of the powder and 1 g of a polyol-based dispersant SN manufactured by Sunopco Co., Ltd. were stirred and mixed in a ball mill for 1 hour to obtain a dispersion 7 . To the dispersion 7 in the ball mill, 25 g of acrylic resin G50 produced by Hoyo Chemical Industry Co., Ltd. and 3 g of DOA produced by Daihachi Chemical Industry Co., Ltd. were added and mixed for 24 hours to obtain slurry 7. The viscosity of this slurry 7 at 20° C. was 4800 cps.

[0080] This slurry 7 was coated on a Luminar film with a bar coater, and dried at 20° C. for 8 hours to obtain a green sheet GS7.

[0081] As the table shows, this GS7 is in very good shape.

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Abstract

The invention provides a raw film, the manufacturing method thereof and the slurry combination for generating the raw film. The raw file is good in binding property, plasticity, property for stripping off from the slices or film used in manufacturing and surface property with no concavo convex, no crack and no wrinkles. The raw film is prepared by coating the slurry combination containing component solvent, binding agent and power onto the slices or films and stripping off after it is dry. In which, the component solvent contains the low boiling point solvent with boiling point below 100 degrees centigrade and high boiling point solvent with boiling point above 100 degrees centigrade.

Description

technical field [0001] The present invention relates to a green sheet used as a substrate material for a circuit or a laminated electronic component, a method for producing the same, and a slurry composition for forming the green sheet used in the method. Background technique [0002] Materials used as various electronic components are formed by printing metal paste, metal ink, etc. on a green sheet to form a circuit, etc., and sintering. In particular, it is often used in multilayer circuit boards formed by laminating and sintering a plurality of green sheets, or in multilayer capacitors, resistors, inductors, and the like. [0003] In general, a green sheet is produced by applying a slurry obtained by mixing powder such as ceramics, a resin binder, a solvent, a plasticizer, etc. on a film, drying it, and peeling it off from the film. [0004] In addition, in order to form a circuit, the green sheet is sintered to form a ceramic substrate. According to the sintering condit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/63
Inventor 新子贵史吉田健彦竹内邦夫
Owner NITTETABU MINING CORP
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