Pick and Place Apparatus Pitch Control via Differential Pulleys
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Solution Overview
Problem
Existing pick and place apparatuses for semiconductor devices require complex and costly mechanisms involving interval control cylinders and solenoid devices to adjust pitches between device holding elements, making precise control difficult and increasing production costs and weight.
Innovation Solution
A pick and place apparatus using an electric motor and/or belt system to control lengthwise pitches between device holding elements, where a single power delivery mechanism adjusts pitches by rotating differential pulleys and belts, allowing for precise control with reduced complexity and weight.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a pair of interval control cylinders and solenoid devices are used to adjust pitches between device holding elements, then pitch adjustment capability is achieved, but device complexity and production cost increase
Solution Approach 1:
The patent combines the functions of multiple interval control cylinders and solenoid devices into a single integrated mechanism. The picker assembler is designed as one unified structure that controls the intervals between all device holding elements simultaneously, eliminating the need for separate control systems for each element pair.
Solution Approach 2:
The picker assembler serves multiple functions: it holds multiple device holding elements, adjusts intervals between all elements, and enables pitch control for both customer tray and test tray operations. This multi-functional design replaces what would otherwise require multiple specialized components.
2Adaptability or versatility
If a pair of interval control cylinders are used to control pitches, then pitch variability is achieved, but weight increases
Solution Approach 1:
Multiple cylinder mechanisms are merged into a single picker assembler structure, reducing the total weight of stationary components while maintaining the ability to vary pitches between device holding elements for different tray types.
3Adaptability or versatility
If multiple separate control mechanisms are used for pitch adjustment, then precise control is difficult to achieve, but control range is sufficient
Solution Approach 1:
The integration of all pitch control functions into a single picker assembler ensures that movements are coordinated and precise across all device holding elements. The unified structure eliminates synchronization errors that would occur with multiple separate control mechanisms.
Solution Approach 2:
The picker assembler incorporates feedback mechanisms that monitor the positions of device holding elements and adjust intervals accordingly, ensuring precise pitch control while maintaining the full control range needed for both customer and test trays.
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 electric motor and belt system simplifies pitch adjustment, reducing production costs and weight while enabling precise control of pitches between device holding elements, improving the efficiency and effectiveness of semiconductor device handling.
Implementation Method 1
a first belt having a first coupling part at an upper part thereof for being coupled to the 1st device holding element and a second coupling part at a lower part thereof for being coupled to the nth device holding element
Data Source
AI summary
A pick and place apparatus includes a 1st to an nth device holding element arranged in a lengthwise direction, every one of the 1st to the nth device holding element being connected to its neighboring one(s) of the 1st to the nth device holding element by means of at least one pitch setting ring; a belt having a first coupling part at an upper part thereof for being coupled to the 1st device holding element and a second coupling part at a lower part thereof for being coupled to the nth device holding element; and a driven pulley and a differential pulley. The driven and the differential pulley are rotated by being engaged with the belt to move the 1st and the nth device holding element such that the 1st device holding element moves in a direction opposite to the nth device holding element.