Traditional Culture Encyclopedia - Traditional virtues - How many lead frames are there?
How many lead frames are there?
Five circuit chips can be mounted on the lead frame. For a long time, packaging manufacturing has been restricted by the lead frame model developed in the early 1980s. One lead frame can accommodate five 20 circuit chips. This frame adopts traditional plastic packaging mold, hanging electroplating line for electroplating, and manually cutting rebar for molding. This mode of production not only has low production efficiency, but also has great security risks when using traditional plastic packaging mold, hanging electroplating line electroplating and manual rib cutting molding mold to configure and process products, resulting in poor consistency of product appearance and size and low packaging yield.
- Related articles
- More than 3 surnames are WeChat heads, and more than 3 surnames are WeChat heads with five-star red flags.
- Ethnic Instruments: Which ethnic group's instrument is the long drum?
- Read the geographical map of Beijing (figure 1), the monthly average temperature and precipitation map (figure 2) and the traditional residential map (figure 3), and answer the following questions.
- There are a lot of waste boards in my house. What handicrafts can I make?
- The Origin of Body Art Painting
- Lianyungang Donghai County urban area in 2023 the Spring Festival temporary stalls set up notice
- Carp painting, oil painting, Chinese painting, watercolor, illustration.
- What is a salty water song?
- How about Huizhou Yuetaitong Logistics Co., Ltd.?
- The activity plan of the trade union to welcome the Dragon Boat Festival