A kind of silver paste multi-layer board for monitoring the operation of generator set and its preparation process

Abstract

The invention relates to the technical field of preparation of printed circuit boards, in particular to a generator set operation monitoring silver paste multilayer board and a preparation process thereof. The silver paste multilayer board sequentially comprises a substrate layer, a first heat conduction insulating layer, a first circuit layer made of conductive silver paste, a second heat conduction insulating layer, a second circuit layer made of conductive silver paste and an element layer; the second circuit layer and the second heat conduction insulating layer are provided with through hole columns, and the through hole columns are filled with conductive silver paste to enable the first circuit layer and the second circuit layer to be electrically connected. The conductive silver paste comprises the following components in parts by mass: 20-30 parts of silver, 50-60 parts of zinc powder, 20-30 parts of aluminum powder, 50-60 parts of nano cellulose, 4-8 parts of a reducing agent,10-25 parts of epoxy resin, 18-22 parts of dodecafluoroheptylpropyltrimethoxysilane, 3-5 parts of hydrochloric acid, 2-4 parts of cyclohexanone and 8-10 parts of a diluent. The conductive silver pasteprovided by the invention has the characteristics of low cost and excellent conductivity.

Description

technical field [0001] The invention relates to the technical field of preparation of printed circuit boards, in particular to a silver paste multi-layer board for monitoring the operation of a generator set and a preparation process thereof. Background technique [0002] PCB (Printed Circuit Board, printed circuit board) has at least one conductive pattern attached to it, and is equipped with holes and grooves to realize the interconnection between electronic components, which is the basis of almost all electronic products. Generally speaking, if there are electronic components in a certain device, they are also integrated on PCB boards of various sizes. In addition to fixing various components, the main function of the PCB board is to provide connection circuits between various components. A multilayer PCB board refers to a printed board with more than two layers. It is composed of connecting wires on the base insulating substrate and pads for assembling and welding elect...

AI Technical Summary

Problems solved by technology

[0003] Silver has the best electrical conductivity among all metals, stable chemical properties, and excellent processing properties, so it is often used as a conductive filler in conductive pastes, but it has the disadvantage of being expensive. In order to reduce the cost and maintain its excellent electrical conductivity , other metals can be added as conductive auxiliary fillers. Generally, fillers such as copper, aluminum, zinc, iron and nickel are used. These materials also have low resistivity and are cheap

[0004] Epoxy resin can be cured at a lower temperature, and has excellent mechanical properties and processing properties. It is often used as the bonding phase of conductive paste, but general epoxy resin has certain hygroscopicity. If aluminum, zinc When metals such as aluminum are used as auxiliary conductive materials, general epoxy resin is used as the bonding phase, and metals such as aluminum and zinc are easily subjected to electrochemical corrosion, resulting in poor resistance stability and cannot be well used in conductive pastes. A conductive paste with low price and good conductivity is needed