Research and development of electroplating machines and electroplating wheels

With the development of the electronic information industry and the expansion of integrated circuit production capacity, the integrated circuit industry has achieved unprecedented growth in recent years. In the production of integrated circuits, lead frames are important auxiliary materials. In order to ensure the working performance of the lead frame, it is necessary to perform local precious metal point plating on specific areas.

According to the different control methods of point plating area, point plating can be divided into three types: track type point plating, pressure plate type point plating, and wheel type point plating. The mold for pressure plate point plating is simple to make, but the coating thickness is uneven. Under the influence of accumulated tolerances in the lead frame, the plating area will shift after long-term operation. The wheeled point plating tool has the advantages of high efficiency and uniform coating thickness, but it requires high requirements for mold making. The common problems with spot plating wheels on the market are low form and position accuracy and poor dimensional accuracy. In modern high-speed production, the speed of the material strip is relatively fast, resulting in significant circular jumping of the plating wheel, causing the material strip to tremble and wrinkle or fatigue during production, which affects the accuracy of the product.

Our company mainly adopts the following methods to solve the above problems:

1. Use an image measuring instrument with a resolution of 1 μ to continuously measure the length of n lead frame units on the lead frame strip used in the production line, and then calculate the length of each lead frame unit.

2. Accurately calculate the diameter of the working surface of the spot plating wheel. To solve the dimensional deviation between the material strip and the spot plating wheel in the working environment, our company has summarized the precise formula for spot plating wheel manufacturing dimensions based on 22 years of experience in spot plating wheel manufacturing, and solved the above problems.

3. Adopting innovative masking film design and a unique ceramic positioning pin selection.

The following picture shows our company's products after point plating wheel plating: