This cover series suits parallel seam welding. Chemically etched stepped covers are made from 4J42, with thin edges and a thick center to meet welding requirements while providing compressive strength. Two thicknesses are selected according to overall size. Unless otherwise specified, covers with perimeter ≥120mm are 0.4mm thick, while those with perimeter <120mm are 0.25mm thick. Gold plating or electroless nickel plating is available. For newly developed products, possible dimensional changes and short lead times often favor an initial lap-welded stepped cover made from 4J29. Etched stepped covers are then tooled and produced for subsequent orders. Both processing types provide essentially the same sealing effect.
These covers suit parallel seam-welding processes. Stepped covers are chemically etched from 4J42 material; thin edges and a thick center meet welding requirements and provide compressive strength. Two cover thicknesses are selected according to overall size.
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Hefei Yifeng Electronic Packaging Co., Ltd. is located in Hefei, the "city of science and education", formerly known as the "old land of the Three Kingdoms and hometown of Bao Zheng". It is a national high-tech enterprise focusing on the R&D, production and sales of metal and ceramic electronic packaging products. The company was founded in 2009 with a registered capital of 5 million yuan and a plant area of 8,000 square meters.
Since its establishment, it has always adhered to the business philosophy of "customer-centric, striver-oriented, continuously improving production efficiency, and continuously improving striver compensation", practiced the service spirit of "customer-centric, honest business, serving society", and built an open and pragmatic corporate culture ecology. With customer needs as the purpose and customer satisfaction as the goal, it builds our core competitiveness with excellent quality, insists on continuous improvement, pursues better solutions, and shares the same breath, destiny, progress and development with customers.
The company has a full-process production line from precision machining, sintering and sealing to surface treatment. After years of technical accumulation and innovation, it has a full industrial chain ecosystem from R&D, design to production and manufacturing, and has the design and manufacturing capability of miniaturized and lightweight shells. At the same time, it also has mature and stable processing capabilities in difficult material processes such as aluminum-silicon, titanium alloy, ceramics, and local plating. It has obtained ISO9001:2008 and other certificates, won the "High-tech Enterprise" in 2019, and has multiple invention patents.
The company's main customer group is large and medium-sized listed companies, and the customer group is high-quality and stable. Product series include: power supply shells, hybrid integrated circuit shells, filter shells, transformer shells, semiconductor laser shells, optical communication module components, infrared detection tubes, etc. It has provided supporting services for many large and medium-sized enterprises, filter companies, laser device companies, and optical communication device companies in China, and has won their trust and support.