Xinde Semiconductor's new patents are innovative and promote the process of chip miniaturization
Jiangsu Xinde Semiconductor Technology Co., Ltd. successfully applied for a patent called "A chip stacking packaging structure" through the State Intellectual Property Office. This new technology marks a major progress in chip miniaturization and will have a profound impact on the future development of electronic devices. The patent announcement number is CN222530417U and the application date is March 2024. The launch of this technology will help improve the application performance of mainstream chips in various electronic devices.
The patent abstract shows that the utility model discloses a chip stacking packaging structure, including a substrate, a main chip is flipped on the front of the substrate , a filler is filled between the main chip and the substrate, a solder ball 1 is planted on the pad 1 of the substrate around the main chip, a plastic sealing layer is provided on the front of the substrate, the plastic sealing layer covers the solder ball 1 and the main chip, but the top of the main chip and the solder ball 1 are exposed, a high-bandwidth memory chip is flipped on the top of the main chip, the top of the solder ball 1 is welded to the solder pad 2 of the high-bandwidth memory chip, and a groove is provided on the plastic sealing layer located on one side of the high-bandwidth memory chip, and a solder ball 2 is planted on the back of the substrate. The utility model flips the main chip such as the CPU/GPU on the substrate, and then realizes vertical short-distance interconnection between the substrate surface planting ball and the high-bandwidth memory chip through the stacking packaging technology. The packaging structure is smaller in size, and the subsequent assembly occupies less space, realizing chip miniaturization, and the electrical signal connection path is greatly shortened, achieving low latency in signal transmission.
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