Piezoelectrics & Acoustooptics, Volume. 46, Issue 5, 695(2024)
Gold-Removal Process of Ceramic Packaged SAW Filter
The paper presents a tin-plating solution to remove gold using a carrier board for ceramic packaged SAW filters. Batch mounting of filters can be achieved using a tin-plating carrier board with external expansion solder pads. Meanwhile, reflow is performed on the heating table to dissolve the gold layer of the filter pad. After removing the tin-plating filter, the solder on the surface of the pads is suctioned off using a vacuum tin gun to remove the gold. A detailed introduction to the solder-pad design of the carrier board is provided herein. The abovementioned operation is monitored using an infrared thermometer. After gold removal, the device is analyzed based on the pad surface and solder joint interface. Subsequently, verification via an environmental test is performed to confirm that the gold plating layer on the solder pad surface is completely removed and that the device demonstrates high reliability. The results provide a reference for the design of the gold-removal process for ceramic sealed devices.
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TANG Panliang, LI Yafei, HUANG Ying, ZHANG Junchong, LENG Junlin, MA Jinyi. Gold-Removal Process of Ceramic Packaged SAW Filter[J]. Piezoelectrics & Acoustooptics, 2024, 46(5): 695
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Received: Sep. 26, 2024
Accepted: Jan. 17, 2025
Published Online: Jan. 17, 2025
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