Silk screen aided laser soldering method for heterogeneous multi-layer structure
A technology of composite structure and brazing method, which is applied in the direction of laser welding equipment, welding equipment, welding equipment, etc., can solve the problems that it is difficult to ensure the full connection between the side electrode and each layer, the processing process is difficult to control, and the automation level is limited. Ensure that the components are not damaged by local heating, the processing process is easy to control, and the processing efficiency is high.
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example 1
[0024] Example 1: Welding of piezoelectric ceramic transformer side electrodes
[0025] Piezoelectric ceramic transformer is a device made of piezoelectric ceramic material with voltage conversion characteristics. It consists of two drive components and one power generation component. In this example, the PECT power generation component is only 3mm thick and 30mm in diameter. The sides are covered with a layer of silver. The internal electrodes of each odd-numbered piezoelectric ceramic sheet are alternately arranged with the internal electrodes of each even-numbered sheet to form a positive bus electrode and a negative bus electrode at the power generation terminal respectively. The bus electrode is a silver layer with a thickness of about 10 μm. The polarization directions of adjacent piezoelectric ceramic sheets are opposite. The positive and negative bus electrodes at the power generation end are led out from the side respectively. The width of the side electrodes is be...
example 2
[0032] Example 2: Formation of side poles of laminated mica capacitors
[0033] This kind of capacitor uses mica sheet as the medium, and the thickness is generally between 15 and 60 μm. Then one side of this mica sheet is coated with a layer of silver to form a silver electrode. Several silver-coated mica sheets are alternately stacked and pressed together as shown in the figure to form a capacitor body, and then processed by this method to form electrodes on both sides, and then cut into individual components, and encapsulating materials are added to the outside to form them.
[0034] The size of the green body is 3×20×6mm, the thickness of the mica sheet is 30 μm±10%, and the thickness of the silver electrode is about 20 μm±10%.
[0035] Side pole forming method according to the present invention
[0036] (1) Referring to the laser brazing method of surface mount components, select 43% Sn43% Pb14Bi+15% RHG flux, and its working temperature is between 210°C and 240°C. Sin...
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