Disk Flexure Detouring Extending Portion Adhesive Migration
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Solution Overview
Problem
Conductive adhesives used in disk devices can migrate through the wiring portions due to capillary action, potentially causing malfunctions or crashes by adhering to unintended locations and detaching from the wiring, which existing wall structures fail to prevent effectively.
Innovation Solution
A flexure design incorporating a detouring extending portion on the conductor portions, which extends from the side surface of the conductor in a direction intersecting the length of the conductor, preventing the conductive adhesive from migrating along the wiring by creating a longer path and blocking its flow to unintended locations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a wall portion is added to prevent adhesive migration, then adhesive blocking is improved, but device complexity increases
Solution Approach 1:
The patent merges the wall portion with the conductor portion by forming the wall portion as an integral extension of the conductor portion's side surface. This integration eliminates the need for separate adhesive blocking structures, thereby preventing adhesive migration while avoiding additional device complexity.
Solution Approach 2:
The conductor portion is given dual functionality: it serves both as an electrical conductor and as an adhesive barrier through its integrated wall portion. This multi-functionality allows the same structure to perform both electrical and protective roles, improving adhesive blocking without increasing overall device complexity.
2Reliability
If the conductor portion is made wider to prevent adhesive migration, then adhesive blocking is improved, but manufacturing precision requirements increase
Solution Approach 1:
Instead of uniformly widening the entire conductor portion, the patent applies a localized wall portion only at specific locations where adhesive migration is most likely to occur. This local enhancement provides effective adhesive blocking while maintaining the original conductor dimensions elsewhere, thereby avoiding increased manufacturing precision requirements.
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 detouring extending portion effectively inhibits the migration of conductive adhesive along the conductor portions, reducing the risk of malfunctions and crashes by ensuring the adhesive remains within the intended terminal area.
Implementation Method 1
there is a narrow gap between each adjacent pair of conductor portions. Due to such a structure, there are apprehensions that the conductive adhesive may be carried far by capillary action.
Data Source
AI summary
A flexure includes a metal base, a base insulation layer formed on the metal base, a terminal formed on the base insulation layer, a conductor portion electrically conductive to the terminal and an detouring extending portion formed on the conductor portion. The conductor portion includes a conductor and a cover layer covering the conductor. A conductive adhesive is supplied to the terminal. The detouring extending portion is formed in a longitudinal middle of the conductor portion and extends from the side surface of the conductor portion in a direction intersecting the length direction of the conductor portion along the base insulation layer.