QFP Package Power Bus Between Adjacent Dies
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional QFP packages face challenges in efficiently supplying power to adjacent dies due to the use of fly-over and stitch bonding methods, which result in long connections and poor electrical performance, making manufacturing difficult and prone to defects.
Innovation Solution
A QFP package design featuring a power supply bus that protrudes between adjacent dies, allowing for shorter connections and improved power distribution, with the option of using wire-bonding or other connection methods, and incorporating multiple power supply buses and die paddles to enhance electrical performance and manufacturability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If fly-over bonding method is used to supply power to adjacent dies, then power can be supplied to all dies, but connection length becomes long resulting in poor electrical performance
Solution Approach 1:
The patent introduces a power supply bus that extends in the lateral direction between adjacent dies, changing the power distribution from a vertical fly-over path to a lateral path that directly connects to adjacent die edges. This dimensional change reduces connection length and improves electrical performance while maintaining power supply capability to all dies.
2Ease of manufacture
If stitch bonding method is used to supply power to adjacent dies, then power can be supplied through shared wire, but double current flows through wire section resulting in manufacturing difficulty and high defect rate
Solution Approach 1:
The patent segments the power distribution by providing separate power supply bus sections for different dies, with each die having its own dedicated connection path. This eliminates the stitch bonding requirement where a single wire carries double current, thereby reducing manufacturing complexity and defect rates while maintaining power supply efficiency.
3Reliability
If fly-over bonding method is used for power supply, then power distribution is achieved, but manufacturing difficulty increases and defect rate becomes high
Solution Approach 1:
The patent introduces a power supply bus as an intermediary structure that facilitates power distribution to adjacent dies without requiring complex fly-over bonding procedures. The bus acts as a mediator between the package fingers and the die power connections, simplifying the manufacturing process while maintaining reliable power distribution capability.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution enables better electrical performance and manufacturability by reducing connection lengths and eliminating the need for long wire bonds, resulting in a more reliable and efficient power distribution system within the QFP package.
Implementation Method 1
a power supply bus 16 which protrudes between adjacent sides of the first die 12 and the second die 14 and which supplies power to the adjacent sides via connections 18 to the adjacent sides
Data Source
AI summary
A Quad Flat Pack (QFP) package which includes first and second dies arranged in a side-by-side orientation, and a power supply bus which protrudes between adjacent sides of the first and second dies and which supplies power to the adjacent sides via connections to the adjacent sides.