Metal Cutting Fluid with Organic Acid and Oxidizing Agent
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Solution Overview
Problem
Conventional cutting methods for metal workpieces, such as QFN substrates and semiconductor wafers with TEG, often generate burrs that can cause short-circuits and bonding failures due to the ductility of the materials involved.
Innovation Solution
A cutting method using a cutting fluid containing organic acids and oxidizing agents, with optional ultrasonic vibration applied to the cutting blade, to reduce metal ductility and facilitate burr removal, while an anticorrosive is included to prevent corrosion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a cutting blade is used to cut metal workpieces such as QFN substrates or semiconductor wafers with TEG, then the workpiece can be divided into individual devices, but burrs are generated at the metal parts causing short-circuits and bonding failures
Solution Approach 1:
The patent applies parameter changes by modifying the chemical properties of the metal surface through a cutting fluid containing oxidizing agents and organic acids. This changes the ductility of the metal at the cutting zone, making it easier to cut without burr generation. The oxidizing agent creates an oxide layer on the metal surface, while the organic acid modifies the metal's mechanical properties, collectively reducing burr formation while maintaining cutting efficiency.
Solution Approach 2:
The cutting fluid acts as an intermediary substance between the cutting blade and the metal workpiece. It mediates the cutting process by chemically interacting with the metal surface to reduce ductility and prevent burr generation. The cutting fluid containing oxidizing agents and organic acids serves as a chemical mediator that facilitates clean cutting without direct mechanical burr formation.
2Ease of manufacture
If conventional cutting methods are used on metal workpieces, then cutting can be performed, but the ductility of metal materials causes burr generation that leads to short-circuits and bonding failures
Solution Approach 1:
The patent changes the chemical and mechanical parameters of the metal surface through the cutting fluid. The oxidizing agent creates an oxide layer and the organic acid modifies ductility, transforming the metal's properties at the cutting zone. This parameter change enables easy cutting while preventing burr generation, thereby maintaining both ease of manufacture and reliability by preventing short-circuits.
Solution Approach 2:
The patent converts the harmful effect of metal ductility (which causes burr generation) into a beneficial effect. By using the cutting fluid to control and modify ductility, the previously problematic property becomes advantageous - the metal becomes easier to cut cleanly without burrs. The harmful burr generation is transformed into beneficial burr-free cutting through chemical modification.
3Manufacturing precision
If a cutting fluid containing oxidizing agent and organic acid is used, then burr generation is restrained and metal surface properties are improved, but the complexity of the cutting fluid composition increases
Solution Approach 1:
The patent merges multiple functions into a single cutting fluid composition. The cutting fluid simultaneously contains oxidizing agents for surface oxidation, organic acids for ductility modification, and potentially other additives for corrosion prevention and cooling. This merging of multiple chemical components into one unified cutting fluid achieves burr removal, surface property improvement, and process simplification, offsetting the compositional complexity with functional integration.
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 method effectively suppresses burr generation and enhances processability by modifying the metal surface properties, making it easier to cut and handle the workpieces without corrosion issues.
Implementation Method 1
By the organic acid contained in the cutting fluid, the metal is modified to be lowered in ductility
Implementation Method 2
with the oxidizing agent contained in the cutting fluid, the properties of the film formed on the metal surface are changed by the cutting fluid
Implementation Method 3
the cutting step is carried out with an ultrasonic vibration applied to the cutting blade in a radial direction of the cutting blade
Data Source
AI summary
A cutting method for cutting by a cutting blade a workpiece which includes metal at least in a predetermined cutting position. The cutting method includes a cutting step of cutting by the cutting blade the predetermined cutting position of the workpiece while supplying a cutting fluid, containing an organic acid and an oxidizing agent, to a processing point at which the cutting blade cuts into the workpiece.