Multi-Blade Substrate Division with Abrasive Spacer
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Solution Overview
Problem
The existing methods for cutting substrates, such as the step cut method using two types of blades, increase work man-hours and time due to the need for multiple cutting stages, which hampers productivity in device manufacturing.
Innovation Solution
A multi-blade system with a rotationally driven shaft, multiple cutting blades, and spacers with an abrasive grain layer that allows simultaneous cutting and shaping of workpieces, enabling the formation of desired shapes and inclinations on chip surfaces during division.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If the step cut method using two kinds of blades is employed to give various shapes to chips, then the desired shapes (inclinations and steps) can be formed on chip surfaces, but the work man-hours and work time increase due to multiple cutting stages
Solution Approach 1:
The patent combines multiple cutting blades with different blade widths and cutting depths into a single multi-blade assembly that rotates together on one shaft. This allows simultaneous execution of multiple cutting operations (forming both shallow grooves and deep cuts, creating inclinations and steps) in one work cycle, thereby reducing the number of separate processing steps and improving productivity while maintaining the desired chip shapes
2Shape
If the step cut method using two kinds of blades is employed to divide substrates, then individual chips are formed with specific shapes, but the processing time becomes longer due to sequential cutting operations
Solution Approach 1:
The multi-blade assembly enables continuous cutting action across the entire substrate width in a single pass. Multiple blades with different configurations work simultaneously and continuously on different regions of the substrate, eliminating the idle time and sequential transitions between separate cutting operations, thus reducing processing time while maintaining continuous material removal and shape formation
3Manufacturing precision
If multiple cutting stages are used to form desired chip shapes, then precise shaping is achieved, but the work man-hours increase
Solution Approach 1:
The multi-blade assembly functions as a multi-functional tool that performs multiple cutting tasks simultaneously. Different blades within the same assembly can have varying widths, cutting depths, and angles, allowing the system to execute diverse shaping operations (inclination formation, step creation, groove cutting) in parallel, thereby maintaining manufacturing precision across different chip features while reducing the total number of processing steps and workman-hours required
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
This approach reduces work man-hours and time by allowing simultaneous cutting and shaping, improving productivity while enabling various shapes to be given to chip surfaces during the division process.
Implementation Method 1
an outer surface of the spacer exposed from between the cutting blades is formed into a transfer shape that forms a desired shape in an outer circumference of a chip and is covered by an abrasive grain layer
Data Source
AI summary
A multi blade that processes semiconductor packages into a desired shape while dividing a package substrate includes plural cutting blades that divide the package substrate into the individual semiconductor packages and a spacer provided between two cutting blades adjacent to each other, and is configured in such a manner that the cutting blades and the spacer have the same rotation axis center. The outer surface of the spacer is formed into a transfer shape of the semiconductor package and is covered by an abrasive grain layer, and the upper surface of the package substrate is ground by the outer surface of the spacer simultaneously with cutting of the package substrate by the plural cutting blades.