Method for preparing electrode silver paste for environment-friendly semiconductor capacitor

A technology for semiconductors and capacitors, which is applied in the field of preparation of electrode silver paste for semiconductor capacitors. It can solve the problems that lead-containing silver paste cannot meet the needs of the industry, and achieve the effects of high capacitance, adhesion, solder resistance, and low loss

Inactive Publication Date: 2011-08-17
IRICO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The original lead-containing silver paste cannot meet the needs of the industry

Method used

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  • Method for preparing electrode silver paste for environment-friendly semiconductor capacitor

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Embodiment Construction

[0019] The present invention will be further described below through specific examples.

[0020] The preparation method of electrode silver paste for environment-friendly semiconductor capacitor of the present invention comprises the following basic steps:

[0021] Step A: Preparation of environmentally friendly glass powder

[0022] Weigh according to the raw material composition and mass percentage of environmentally friendly glass powder:

[0023] Bi 2 o 3 70-76%; SiO 2 11-15%; SrO 2-6%; ZnO 6-10%; TiO 2 1-3%;

[0024] Mix the above-mentioned raw materials that have been weighed evenly and heat them in a high-temperature furnace. The temperature control range is 900-1200 ° C, and the holding time is 30-60 minutes. After the melted glass powder particles are quenched with deionized water, they are ball-milled to 0.5 -2um, sieved with 200-400 mesh, dried for later use; the glass powder with SrO and TiO2 added and the substrate of the capacitor are more likely to eute...

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Abstract

The invention discloses a method for preparing environment-friendly electrode silver paste for a semiconductor capacitor. The electrode silver paste is used for screen printing and is prepared from superfine silver powder, environment-friendly glass powder, an organic carrier and a solvent. The method has the following beneficial effects: the environment-friendly electrode silver paste prepared by the method is mainly applied to the semiconductor capacitor, is coated on the surface of a dielectric substrate of the semiconductor capacitor through screen printing and then is sintered into an electrode; the electrode silver paste is an important material for the semiconductor capacitor and has the characteristics of low loss, high capacitance, strong adhesion and welding resistance; and the silver paste prepared by the method absolutely meets the environmental requirements (free of Pb, Cd, Hg, Cr(VI), poly brominated biphenyl (PBB) and poly brominated diphenyl ether (PBDE) and conforming to the directive 2005/84/EC of European union RoHS on phthalates) of European union RoHS (restriction of hazardous substances) and is an ideal substitute for the non-environment-friendly silver paste which is commonly used at present.

Description

technical field [0001] The invention belongs to the technical field of electronic materials, and in particular relates to a method for preparing electrode silver paste for semiconductor capacitors. Background technique [0002] Semiconductor capacitors use semiconductor materials with high dielectric constants such as barium titanate, strontium titanate, manganese oxide, strontium oxide and zinc oxide as dielectrics, print electrode paste on the surface of the dielectric, sinter at high temperature and weld the leads, and then use rings Oxygen resin is made for the insulating protective layer. The shape of semiconductor capacitors is mostly chip type. The loss factor of the semiconductor capacitor is very small, the resonant frequency is high, and it has the characteristics of the semiconductor. Semiconductor capacitors are currently used as basic components in various electronic fields such as televisions, computers, and electronic instruments. With the popularization of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B1/22H01B13/00H01G4/008
Inventor 李宝军
Owner IRICO
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