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Method for detecting weldability of ceramic filter silver paste

A ceramic filter and detection method technology, which is applied in the direction of material inspection products, instruments, measuring devices, etc., can solve the problems of uneven heating of ceramic filters, inability to continuously test samples to be tested, poor temperature control effect of solder tanks, etc., to achieve Improve batch stability, reduce measurement error, and evenly heat the effect

Active Publication Date: 2020-12-04
JIANGSU HOYI TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above-mentioned test method has some deficiencies. First, when the device of the ceramic filter is large, when the ceramic filter is immersed in the solder bath, it is easy to cause the ceramic filter to be heated unevenly, and the ceramic body will burst; second, the sample to be tested is immersed in Flux, and then dipped into the solder tank, the amount of flux remaining on the silver layer is uncontrollable, the error is large, and it is easy to have a great impact on the test results; third, the temperature control effect of the solder tank is poor, and it cannot be used for large quantities. The samples to be tested are continuously tested, which reduces the test efficiency

Method used

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  • Method for detecting weldability of ceramic filter silver paste
  • Method for detecting weldability of ceramic filter silver paste
  • Method for detecting weldability of ceramic filter silver paste

Examples

Experimental program
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Embodiment 1

[0016] The invention is a method for detecting the solderability of ceramic filter silver paste, comprising the following steps: first, using a spray gun to spray silver paste on the surface of a ceramic-based filter, the spray thickness is 16um, and the feed flow rate of the spray gun is 200ml / h, the feed pressure is 0.25MPa, the atomization pressure is 0.3MPa, drying at 180-220°C for 10-15min, and then sintering at 850-900°C for 60-90min, forming on the surface of the ceramic filter 10-12um conductive silver layer; second, wash the ceramic filter after silver burning with ethanol solution for 2-3 times, and dry it for later use; third, use a solder paste printing machine, such as figure 1 As shown, 5 solder paste cylinders with a diameter of 3 mm and a height of 1 mm are printed on the surface of the silver layer of the ceramic filter. The distance between each solder paste cylinder is 1 cm, and the oven is baked at 300 ° C for 3-4 minutes. Take out the ceramic filter and c...

Embodiment 2

[0018] The difference between embodiment 2 and embodiment 1 is that the solder paste is lead-free solder containing 99% tin and 1% copper, and the length, width and height of the ceramic filter are 8cm*6cm*1cm.

Embodiment 3

[0020] The difference between embodiment 3 and embodiment 1 is that the solder paste is lead-free solder containing 97% tin and 3% silver; the length, width and height of the ceramic filter are 12cm*10cm*2cm.

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Abstract

The invention discloses a method for detecting weldability of ceramic filter silver paste. The method comprises the following steps of: 1, spraying the silver paste on the surface of a ceramic-based filter by using a spray gun, drying and sintering to form a conductive silver layer; 2, cleaning the ceramic-based filter subjected to silver burning by adopting an ethanol solution, and drying for later use; 3, printing a solder paste cylinder with the diameter being 3 mm and the height being 1 mm on the surface of the silver layer of the ceramic-based filter through a solder paste printing machine, carrying out baking for 3-4 min in a baking oven at the temperature of 290-310 DEG C, and taking out the ceramic-based filter, and cooling to the room temperature; 4, measuring the spreading area of the solder paste on the surface of the ceramic-based filter, and calculating according to the formula that the tinning proportion= the spreading area of the solder paste / the round bottom area of thecylindrical solder paste*100%. The method for detecting the weldability of the ceramic filter silver paste is simple in process, accurate in measurement and high in detection efficiency; the batch stability of products is improved, and losses caused by unqualified weldability of shipment products are reduced.

Description

technical field [0001] The invention relates to the technical field of silver paste detection, in particular to a method for detecting the solderability of silver paste of a ceramic filter. Background technique [0002] With the great development of 5G infrastructure industry, the key component of 5G base station - 5G ceramic dielectric filter will also usher in a big explosion. The metallization process of the surface of the ceramic filter with silver paste is a connecting link in the whole process of the ceramic filter, and the solderability of the silver paste layer on the surface of the ceramic filter determines the final quality of the ceramic filter. [0003] At present, the detection method of the solderability of the paste is generally to dip the sample to be tested in the flux first, and then paste the sample to be tested soaked in the flux on the filter paper for 1 second to remove the excess flux, and then immerse it in the solder tank. 5s, finally take out the s...

Claims

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Application Information

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IPC IPC(8): G01N33/38G01B11/28
CPCG01N33/388G01B11/285
Inventor 杨爱民司留启白宝柱
Owner JIANGSU HOYI TECH