Chip thermal pressure detection method, system and thermal compression packaging control system

Abstract

The invention discloses a chip thermal pressure detection method. The method includes the steps of 1, a circular impression image made by a circular bump of a hot-pressed chip on an antenna; 2, extracting an outline and a center of circle from the circular impression image; 3, equally dividing the outline along the periphery into multiple arc segments; 4, acquiring width of each arc segment; 5, weighting and adding the widths of the arc segments to obtain impression width. The invention further provides a thermal pressure detection system and a chip hot-pressing packaging control system both based on the method; according a difference between the detected impression width and target impression width, a corresponding pressure control command is generated to adjust hot pressure of a hot-pressing head unit upon the chip. The pressure is indicated by the impression width, the magnitude of the pressure is adjusted according to the difference of the impression widths, and thus pressure uniformity is ensured and hot-pressing precision and product performance are improved.

Description

technical field [0001] The invention belongs to the technical field of electronic packaging, and relates to a chip thermal pressure detection method and system, and a thermal compression packaging control system. Background technique [0002] The hot pressing process is an important part of the RFID tag packaging process. The function of the hot pressing system is to achieve a reliable connection between the chip and the substrate through temperature and pressure. The hot pressing effect directly affects the performance parameters of the finished product. Appropriate temperature and pressure can ensure the quality of packaging and improve the performance of finished products. [0003] At present, most of the hot pressing systems suitable for packaging equipment with RFID tags have realized closed-loop control of hot pressing temperature, but the control of hot pressing pressure generally adopts an open-loop or semi-closed-loop method. The Chinese patent with the publication...

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Problems solved by technology

[0004] In view of the defect that the existing hot-pressing system used for RFID label packaging equipment cannot realize the stable hot-pressing pressure, the present invention proposes a chip hot-pressure detection method, system and hot-pressing packaging control system. Characterize the pressure, adjust the air pressure according to the deviation of the indentation width, so as to ensure consistent pressure and improve the accuracy of hot pressing and the performance of finished products

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