Packaging structure and packaging method for fingerprint recognition chip

Abstract

The invention discloses a packaging structure and a packaging method for a fingerprint recognition chip. The packaging structure comprises a substrate, a sensing chip, a plurality of wires and a plastic package layer. The substrate is provided with a first surface, and the first surface of the substrate is provided with a first welding pad layer. The sensing chip is located on the first surface of the substrate and provided with a first surface and a second surface, the second surface of the sensing chip is located on the first surface of the substrate, the first surface of the sensing chip is provided with a sensing area and a peripheral area, and the surface of the portion, in the peripheral area, of the sensing chip is provided with a second welding pad layer. The two ends of the wires are electrically connected with the first welding pad layer and the second welding pad layer respectively, the wires have top points with the maximum distance to the surface of the substrate, and a first distance is reserved between the top points and the first surface of the sensing chip. The plastic package layer is located on the surface of the substrate and the surface of the sensing chip and surrounds the wires and the sensing chip, and a second distance is reserved between the surface of the plastic package layer and the first surface of the sensing chip and is larger than the first distance. According to the packaging structure, the requirement for the sensitivity of the sensing chip is lowered, and application is wider.

Description

technical field [0001] The invention relates to the technical field of semiconductor manufacturing, in particular to a fingerprint identification chip packaging structure and packaging method. Background technique [0002] With the progress of modern society, the importance of personal identification and personal information security has gradually attracted people's attention. Due to the uniqueness and invariance of human fingerprints, fingerprint identification technology has the characteristics of good security, high reliability, and simple and convenient use, making fingerprint identification technology widely used in various fields to protect personal information security. With the continuous development of science and technology, the information security of various electronic products has always been one of the key points of technological development. Especially for mobile terminals, such as mobile phones, notebook computers, tablet computers, digital cameras, etc., th...

AI Technical Summary

Problems solved by technology

[0005] However, in the existing fingerprint identification devices, the sensitivity of the fingerprint identification chip is required to be high, which limits the manufacture and application of fingerprint identification devices.

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