Heat Curable Conductive Paste

Abstract

To provide a thermosetting electrically conductive paste excellent in laser processability and enabling an electrode having high electrical conductivity to be formed. According to the present invention, the thermosetting electrically conductive paste is provided. The thermosetting electrically conductive paste contains an electrically conductive powder, a thermosetting resin and a curing agent. The electrically conductive powder contains a non-agglomerated electrically conductive powder and an agglomerated electrically conductive powder different from each other in a degree of agglomeration expressed by a ratio (L-D 50 / SEM-D 50) between a number-basis average particle size (SEM-D 50) based on electron microscope observation and a volume-basis average particle size (L-D 50) based on a laser diffraction scattering particle size distribution measurement method. The degree of agglomeration of the non-agglomerated powder is 1.5 or smaller, the degree of agglomeration of the agglomerated powder exceeds 1.5 and is 3 or smaller, the L-D 50 of the agglomerated electrically conductive powder does not exceed L-D 50 of the non-agglomerated electrically conductive powder.

Description

technical field [0001] The present invention relates to a heat-curable conductive paste. Background technique [0002] In recent years, various electrical and electronic devices have been enhanced in performance such as miniaturization, high density, and high-speed operation. Accordingly, for electronic components for electric-electronic devices, electrodes are required to be further densely thinned. However, in the case of the printing method commonly used in the past when forming electrodes, it is difficult to form thin-line electrodes with high precision. Furthermore, electrodes of 50 μm / 50 μm or less. [0003] Therefore, the utilization of the laser etching method using a laser is examined. In this method, first, a conductive paste is produced in the same manner as conventionally. Next, the manufactured conductive paste is printed on a desired substrate to form a conductive coating (conductive film). Next, the formed conductive film is irradiated with laser light so...

AI Technical Summary

Problems solved by technology

However, in the case of the printing method commonly used in the past when forming electrodes, it is difficult to form thin-line electrodes with high precision. Furthermore, electrodes of 50μm / 50μm or less

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