Piezo buzzer Diaphragm production process: The production process of the piezo element is very complicated,FBelec's piezoelectric element production process as below: batching - calcination - abrasive - forming - firing - ceramic appearance sorting - silver printing - silver burning - polarization - silver sheet appearance sorting - piezo bonding - bee Sounding sound - packaging and storage. FBelec, from piezoelectric sound component ingredients to silver sheets to Piezoelectric Ceramic Chips , pursues perfection in every production step. We hope that every piece of product will be recognized by customers. The product represents the company, and the company represents the product. Customers are assured and comfortable.