Piezoelectric Substrate Polarization Using Slightly Adhesive Sheet
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Solution Overview
Problem
Conventional methods for applying polarization treatment to large-sized piezoelectric substrates result in excessive strain, leading to damage, and handling issues such as misalignment and loss of substrate pieces during processing, especially when using trays with recesses for smaller pieces.
Innovation Solution
A piezoelectric element manufacturing method involving the use of a flat-plate-shaped slightly adhesive sheet to hold piezoelectric substrate pieces, allowing for alignment and voltage application without hindering strain, with specific dimensions and properties to prevent cracking and ensure stable adhesion and heat conduction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a large-sized piezoelectric substrate is used for polarization treatment, then the production efficiency is improved, but the substrate is damaged due to excessive strain
Solution Approach 1:
The patent divides a large-sized piezoelectric substrate into multiple small-sized substrate pieces before applying polarization treatment. This segmentation allows each piece to undergo polarization without experiencing excessive strain that would cause damage, while still achieving the polarization effect for the entire original substrate area through parallel processing of multiple pieces.
2Ease of operation
If adhesive sheet is used to hold piezoelectric substrate pieces, then the handling is improved, but the strain is hindered causing cracks
Solution Approach 1:
The patent modifies the adhesive properties of the holding sheet by using a release paper with controlled release characteristics. The sheet provides sufficient adhesion to prevent substrate pieces from falling during handling and transportation, but allows controlled separation during polarization treatment to enable the substrate to deform without restriction, preventing crack formation.
3Manufacturing precision
If tray with recesses is used to hold piezoelectric substrate pieces, then the alignment is improved, but the substrate pieces are turned over or lost during handling
Solution Approach 1:
The patent removes the problematic recess structure from the holding tray and replaces it with a flat release paper surface. The alignment function is maintained through the flat surface design and handling procedures, while eliminating the risk of substrate pieces being turned over or lost that was inherent in the recess structure during transportation and operation.
4Manufacturing precision
If piezoelectric substrate pieces are placed in tray recesses, then the alignment during polarization is improved, but the contact between probe and terminal becomes unstable
Solution Approach 1:
The patent changes the holding surface from a recessed structure to a flat release paper surface. This flat surface ensures stable contact between the probe and terminal during polarization treatment, eliminating position displacement issues while maintaining proper alignment through controlled placement and handling procedures.
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 enables effective polarization treatment while maintaining alignment and preventing strain hindrance, reducing crack occurrence and improving yield, with enhanced handling and processing efficiency.
Implementation Method 1
a first step of holding the piezoelectric substrate piece on a flat-plate-shaped slightly adhesive sheet
Implementation Method 2
applying a polarization treatment to a piezoelectric substrate... the application of an electric field causes the piezoelectric substrate to deform
Data Source
AI summary
Provided is a method for producing a piezoelectric element in which a piezoelectric body substrate piece is subjected to polarization treatment and a piezoelectric element is produced. The method includes a first step in which the piezoelectric body substrate piece is held on a flat plate-shaped slightly adhesive sheet and a second step in which voltage is applied to the piezoelectric body substrate piece held on the slightly adhesive sheet and the piezoelectric body substrate piece is subjected to polarization treatment.