Automatic production test separating system of ASIC with package ID detection

Abstract

With the continuous development of IC (Integrated Circuit) technology, it has been widely used in all aspects of manufacture, production, consumption and so on, and IC filter as an important part of its production testing is directly related to the quality of IC, and with the wide application of automatic separating system of IC, production testing efficiency and quality was improved greatly. Domestic and international industrial separating systems are mainly developed for mass production and are suitable for civilian products in a single package. Due to its special requirements such as small batch size, multiple varieties, and data traceability, the research institutes ASIC(application-speciflc integrated circuit) is difficult to directly use industrial separating system. At the present time, package ID(identification) number was mainly detected by the naked eye and manual separating method was basically used in China. Therefore, there are many disadvantages such as low efficiency, error-prone, high cost, and the influence of human factors on the quality of IC.Due to the characteristics of the research institutes ASIC production, there are a large number of problems in product separating. In order to improve the production test efficiency and ensure the product quality, an automatic production test separating system of ASIC with package ID number detection has been developed. The system is based on the architecture of the embedded system platform and is mainly composed of the upper computer, the lower computer and the mechanical implementation. First of all, the upper computer software is implemented by the Virtual Basic language in the Virtual Studio platform. Secondly, The lower computer is based on the STM32F407IGH6 of ARM7 architecture, and is implemented by μC/OS III embedded OS(operating system) for mechanical part controlling and host computer interaction. At last, the mechanical part guarantees the test separating of different types of IC through high-magnification cameras, highresolution servo motors and high-precision screw mechanisms. Specially the package ID number detection system is implemented the detection algorithm through the NI-VDM module.Practical application has proved that the system is very stable and reliable, which greatly facilitates the detection of package ID number of IC, greatly reduces or avoids the occurrence of ASIC quality problems, greatly improves the efficiency of production testing, greatly meet the requirements of production, and has far-reaching practical significance.