Ceramic pin, Zhejiang Jingpeng zirconium industry Technology Co., Ltd. to take you to understand

Ceramic pin case is widely used in high reliability package of power electronic devices, such as typical To254, To256 series package. There are generally two types of sealing forms for the pin of this type of encapsulation shell, one is end sealing and the other is shaft sealing. Both of these sealing forms have a certain proportion of air tightness problems in the production process.

For the end sealing structure, surface bonding is formed by metallizing the surface of the welding ring and the porcelain part. Meanwhile, the gap between the pin and the welding ring is filled with silver copper solder to form the sealing structure of the welding ring, porcelain part and the pin. In this structure, due to the difference in thermal expansion coefficient between porcelain parts, welding ring and pin, the metallized edge of welding ring and porcelain parts is stressed greatly in the process of heating and cooling in high temperature welding, which is easy to be pulled apart by solder, resulting in the problem of air tightness.

For the shaft seal structure, the metallization and lead pins in the porcelain parts are filled with silver copper solder, which directly forms the gas seal connection. This type of sealing requires very high clearance accuracy between the hole and the pin. Too narrow clearance pin can not be inserted smoothly, so it can not be assembled and welded; If the gap is too wide, the solder cannot be filled, resulting in welding holes. And the slight fluctuation of the gap size will also cause the amount of solder can not be accurately controlled, resulting in air tightness problems.

Next, Zhejiang Jingpeng Zirconium Industry Technology Co., LTD., to tell you about our ceramic needle processing process is how? I believe you all want to know!

First, put the raw materials on the material rack of the CNC lathe, and select the raw materials of different specifications and diameters according to the type and size of the pins.

Second, start the automatic CNC lathe, install the upper mold, adjust the size parameters of each part according to the requirements of the drawings, and put the raw materials into the mold for processing.

Third, the automatic lathe machining of the pin jack for secondary processing, according to the requirements of the product for drilling or milling welding cup.

Fourth, the secondary processing of the pin jack products are put into the CCD automatic testing equipment for full inspection, to distinguish the bad products and good products.