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Time : 2015-07-31 09:37Source :analogtechnologies Author : Analog Click :

3. Guarantee fixture clamping force, flatness and parallelism
From the reason for generating weld resistance, in order to reduce weld resistance, the size deviation of TEC element should be as small as possible. At the same time, the fixture clamping force should be moderate, the flatness should be less than 0.03mm, and the parallelism should be less than 0.05mm. When soldering, spring pressure should be changed into reed pressure in order to ensure that pressures of two ends are same.

4. Optimizing weld process
During welding, it needs to ensure that temperature field is uniform. After meeting the welding requirements, solder melting time should be reduced as far as possible to decrease thermal shock. In order to reduce the temperature stress caused by shrinkage, cooling curve should be properly optimized.

5. Reducing the amount of solder
Based on meeting the requirements of weld strength and weld resistance, the amount of solder should be reduced as far as possible.

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