Dual-Side Singulation Apparatus for Semiconductor Wafer Processing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Dicing machines face inefficiencies when processing semiconductor wafers or packages with small unit sizes, leading to long cutting times and significant idle time for chuck stations and loading mechanisms, as existing solutions like additional chuck tables or blades do not adequately address the increased complexity and time required for small unit sizes.
Innovation Solution
A singulation apparatus with independently movable cutting devices on opposite sides of a bridge above chuck stations allows for simultaneous processing of multiple wafers, reducing idle time by enabling continuous operation while one cutting device finishes a workpiece and immediately starts on another, and allows for flexible cut types like bevel cuts with a single feed of the chuck station.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If additional chuck tables or blades are provided to increase UPH, then productivity is improved, but device complexity increases
Solution Approach 1:
The patent transitions from a single-side cutting arrangement to a dual-side cutting arrangement on the bridge structure. By placing cutting devices on both sides of the bridge, the system effectively doubles the cutting capacity without proportionally increasing overall system complexity, as both sides share common support infrastructure.
Solution Approach 2:
The cutting devices are made independently movable along the bridge sides, allowing dynamic positioning and flexible configuration. This enables the system to adapt to different workpiece sizes and cutting requirements while maintaining high productivity, rather than requiring fixed additional stations for each configuration.
2Manufacturing precision
If cutting time is extended to handle small unit sizes, then manufacturing precision is improved, but loss of time increases due to idle chuck stations
Solution Approach 1:
The dual-side cutting arrangement with multiple independently movable cutting devices enables continuous processing. While one cutting device is completing precision cuts on a workpiece, another cutting device can simultaneously prepare or process additional workpieces, eliminating idle time and maintaining continuous productive operation.
Solution Approach 2:
The system allows preliminary positioning and preparation of multiple workpieces on the chuck station while cutting is in progress on previous workpieces. The independently movable cutting devices can be repositioned in advance for the next cutting sequence, reducing waiting time and maintaining continuous operation.
3Productivity
If multiple cutting devices are provided to process multiple wafers simultaneously, then productivity is improved, but device complexity increases
Solution Approach 1:
Each cutting device is designed to be independently movable and capable of performing multiple cutting operations on different workpieces. The cutting devices can switch between processing different wafers or performing different cutting patterns, providing multi-functionality that reduces the need for dedicated cutting stations for each function.
Data Source
AI summary
A singulation apparatus and method including: at least one chuck station to which a workpiece is securable, the at least one chuck station being configured to move along a feed direction; a bridge extending above the at least one chuck station, the bridge having a first side and a second side opposite the first side; a first cutting device with members mounted to the bridge and being independently movable along the first side, transversely to the feed direction; and a second cutting device with members mounted to the bridge and being independently movable along the second side, transversely to the feed direction, the first and second cutting devices being configured and arranged for cutting the workpiece.