Leadframe Etching with Barrier for IC Package Integrity
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Solution Overview
Problem
Current electronics packaging technologies face challenges in accommodating high-speed computer devices, particularly in terms of cooling and reliability, while struggling to meet the demands of precision, ultra-miniature form factors, and cost-effectiveness, which are critical for next-generation portable electronics.
Innovation Solution
The method involves providing a leadframe with an integrated circuit, encapsulating it, and mounting an etch barrier below the leadframe, followed by etching, which protects the side rails and reduces the risk of broken or cracked packages, thereby enhancing structural integrity and manufacturing efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If current packaging technologies are used for high-speed computer devices, then device functionality is achieved, but cooling and reliability concerns arise
Solution Approach 1:
The patent transitions from traditional 2D leadframe packaging to a 3D stacked architecture where multiple ICs are vertically arranged on the leadframe. This dimensional change increases the surface area for heat dissipation and allows separation of hot and cold components, directly addressing the thermal management challenge while maintaining device reliability
2Volume of moving object
If precision ultra-miniature form factors are pursued, then device size is reduced, but manufacturing complexity increases
Solution Approach 1:
The patent divides the packaging process into distinct segments: leadframe preparation, IC mounting, encapsulation, and etching. Each segment is optimized independently, allowing precision miniaturization without overwhelming manufacturing complexity. The etch barrier specifically segments the etching process to protect critical small features
3Ease of manufacture
If cost reduction is pursued, then profit goals are met, but manufacturing precision and reliability may suffer
Solution Approach 1:
The etch barrier is mounted on the leadframe before the etching process begins. This preliminary action prevents damage to the ICs and leadframe structures during etching, ensuring manufacturing precision is maintained without requiring expensive post-process repairs or rework
Data Source
AI summary
A method for manufacture of an integrated circuit package system includes: providing a leadframe with an integrated circuit mounted thereover; encapsulating the integrated circuit with an encapsulation; mounting an etch barrier below the leadframe; and etching the leadframe.