Flip chip packaging structure and process, and camera module packaging structure

Abstract

The invention discloses a flip chip packaging structure and a flip chip packaging process, and a camera module packaging structure. The flip chip packaging structure comprises a substrate, a sensor, aflexible circuit board and a plastic packaging layer, wherein a mounting groove is formed in the back surface of the substrate, the sensor is arranged in the mounting groove, the flexible circuit board is arranged on back surface of the substrate in a manner of completely or partially avoiding the mounting groove, the sensor and the flexible circuit board are electrically connected with the substrate, and the plastic packaging layer covers the mounting groove, the sensor and a connecting part of the flexible circuit board and the substrate. According to the flip chip packaging structure, theflexible circuit board completely or partially avoids the mounting groove, the plastic packaging layer is formed through injection molding into the mounting groove via a gap between the flexible circuit board and the mounting groove, effective support and protection are formed at the sensor and the joint of the flexible circuit board and the substrate by means of the plastic packaging layer, the reliability of the packaging structure is improved, and the installation difficulty is reduced, thus the substrate is no longer restricted to a ceramic substrate, thereby reducing cost of the packagingstructure, shortening the delivery cycle, and improving economic efficiency of an enterprise.

Description

technical field [0001] The invention relates to the technical field of chip packaging, in particular to a flip-chip packaging structure and process, and a camera module packaging structure. Background technique [0002] Flip-chip (Flip-Chip) packaging technology has many obvious advantages compared with the traditional wire bonding process, including superior electrical and thermal performance, high I / O pin count, package size reduction, etc., has been Widely used in LED, mobile phone manufacturing and other fields. [0003] Taking the camera module in a mobile phone as an example, in the prior art, the camera module using the Flip-chip process usually mounts the sensor, that is, the photosensitive element under the ceramic substrate, and then passes the ACF heat pressing method under the ceramic substrate. Lay flexible printed circuit board (FPC), because FPC is relatively soft, it cannot provide effective support for the back of the sensor, and the back of the module is e...

AI Technical Summary

Problems solved by technology

[0003] Taking the camera module in a mobile phone as an example, in the prior art, the camera module using the Flip-chip process usually mounts the sensor, that is, the photosensitive element under the ceramic substrate, and then passes the ACF heat pressing method under the ceramic substrate. Lay flexible printed circuit board (FPC), because FPC is relatively soft, it cannot provide effective support for the back of the sensor, and the back of the module is easily affected by external forces and cause damage to the sensor; because ACF is weak in viscosity, the FPC bonded by ACF heat pressing method The pull resistance is relatively weak, so that the module cannot be pulled by external force, and the module is easily damaged during the installation process. The reliability of the module made by the Flip-chip process is not as good as that of the conventional soft-hard board module; and it provides good The placement reliability of the Flip-chip process generally uses ceramic substrates, but only a few companies in the world can produce ceramic substrates, and each production of a ceramic substrate requires expensive mold costs and a long delivery cycle , which leads to the prolongation of the production cycle of the camera module and a substantial increase in the cost, which is not conducive to the economic benefits of the enterprise

Images