Integrated Die Ejector Assembly for Fast Aligned Replacement
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Solution Overview
Problem
Conventional die attach ejector devices require a multi-step process for replacing worn or deformed die ejectors, which is time-consuming and prone to misalignment, leading to increased downtime and risk of damage during the replacement process.
Innovation Solution
An integrated die ejector design that allows decoupling from the die attach ejector machine without disassembling the ejector mechanism and base from the pepper pot, featuring a pepper pot with stepped surfaces and channels, a sleeve with a lip and shaft, and engagement arms, enabling translation along a central axis while maintaining alignment and reducing the need for complex reassembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional die ejectors are replaced using a multi-step process, then the worn or deformed ejector can be replaced, but the process is time-consuming and increases downtime
Solution Approach 1:
The die ejector is divided into separable components (ejector mechanism and base) that can be independently replaced, allowing quick swapping of the ejector mechanism without removing the entire assembly from the pepper pot
Solution Approach 2:
The ejector mechanism is pre-assembled with alignment features and coupling elements that enable direct attachment to the base, eliminating the need for complex alignment procedures during replacement
2Reliability
If conventional die ejectors are replaced component by component, then replacement can be achieved, but proper alignment is difficult and requires multiple attempts
Solution Approach 1:
The coupling elements and alignment features are designed with asymmetric geometries that provide self-alignment during assembly, ensuring that the ejector mechanism automatically aligns with the base in the correct orientation
Solution Approach 2:
Alignment features act as intermediary elements between the ejector mechanism and base, facilitating precise positioning and alignment during the coupling process
3Reliability
If conventional die ejectors are disassembled for replacement, then the ejector can be replaced, but the risk of damaging the pin and needle increases
Solution Approach 1:
The ejector system is segmented into a replaceable mechanism and a stationary base, allowing the mechanism to be swapped without disassembling the base and its vulnerable pin and needle components
Solution Approach 2:
The ejector mechanism is pre-assembled as a complete unit with the pin and needle already installed and protected, eliminating the need to handle and potentially damage these components during replacement
4Reliability
If the pepper pot is decoupled to replace the ejector mechanism, then replacement can be achieved, but the complexity of the process increases
Solution Approach 1:
The ejector system is segmented into a removable mechanism and a stationary base that remains in the pepper pot, eliminating the need to decouple the pepper pot itself and simplifying the replacement process
Solution Approach 2:
The ejector mechanism is extracted as a separate replaceable component from the base assembly, allowing replacement without affecting the pepper pot or requiring decoupling of the entire system
Data Source
AI summary
An integrated die ejector for separating a die from a wafer, the die ejector includes an ejector mechanism that includes an ejector pin. There is an ejector base coupled to the ejector pin and configured to couple the integrated die ejector to a die attach ejector machine. There is a pepper pot at least partially surrounding the ejector mechanism and ejector base and a sleeve coupled thereto and positioned between the ejector mechanism and pepper pot. The sleeve and pepper pot define an upper and lower motion limit of the ejector base and retain the ejector mechanism within the pepper pot such that the integrated die ejector may be coupled to and decoupled from the die attach ejector machine as a single unit to reduce installation time.