Metal Workpiece Processing Fluid Suppressing Ductility
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Solution Overview
Problem
The existing methods for processing metal workpieces, such as WL-CSP substrates, are complex and costly due to the need for multiple processing steps like grinding and cutting, which are inefficient for ductile materials.
Innovation Solution
A method involving the use of a processing fluid containing an organic acid and an oxidizing agent, optionally with an anticorrosive, to grind or polish metal workpieces, thereby simplifying the processing by suppressing metal ductility and preventing burr formation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If multiple different processing methods (grinding + cutting) are combined to process metal workpieces, then the metal can be processed effectively, but the production process becomes intricate and production cost increases
Solution Approach 1:
The patent combines grinding and cutting functions into a single processing step by using a grindstone with specific properties (resin bond with diamond or cubic boron nitride grains) that can both grind and cut metal simultaneously, eliminating the need for separate processing steps and reducing production process complexity
Solution Approach 2:
The grindstone is designed to perform multiple functions - both grinding and cutting - through its unique composition and structure, allowing a single tool to handle what previously required multiple specialized tools and processes
2Manufacturing precision
If multiple different processing methods (grinding + cutting) are combined to process metal workpieces, then the metal can be processed effectively, but production cost becomes higher
Solution Approach 1:
The patent combines grinding and cutting functions into a single processing step by using a grindstone with specific properties (resin bond with diamond or cubic boron nitride grains) that can both grind and cut metal simultaneously, eliminating the need for separate processing steps and reducing production process complexity
3Ease of operation
If conventional grinding or polishing is used on ductile metal materials, then the metal can be processed, but the ductility causes processing difficulties and burr formation
Solution Approach 1:
The patent changes the parameters of the grinding process by using a resin bond grindstone with specific grain types (diamond or cubic boron nitride) and controlled porosity, which allows the grinding mechanism to effectively handle ductile metals by changing how the material interacts with the grinding surface, reducing burr formation and improving processing ease
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 method allows for the straightforward processing of metal workpieces by modifying their surface properties, eliminating the need for additional processing steps and reducing production costs.
Implementation Method 1
the processing fluid contains an organic acid and an oxidizing agent
Implementation Method 2
modifying the metal by the processing fluid
Data Source
AI summary
A method of processing a workpiece which includes metal in a work surface by a processing unit including a grindstone or a polishing pad includes a processing step of grinding or polishing the workpiece by the processing unit while supplying a processing fluid to the work surface of the workpiece. The processing fluid contains an organic acid and an oxidizing agent.