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Implanted piezoelectric ceramic microphone and manufacturing method thereof

A technology of piezoelectric ceramics and microphones, which is applied in the field of bionics in biomedical engineering, can solve the problems that implanted microphones have not achieved major breakthroughs, achieve good frequency response curves, improve response sensitivity, and save assembly space.

Inactive Publication Date: 2009-11-11
EYE & ENT HOSPITAL SHANGHAI MEDICAL SCHOOL FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Clinical practice shows that the microphone coupled to the ossicle chain must meet the requirements of light weight, small size and high sensitivity, so the research and development of implantable microphones has not yet achieved a major breakthrough

Method used

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  • Implanted piezoelectric ceramic microphone and manufacturing method thereof
  • Implanted piezoelectric ceramic microphone and manufacturing method thereof
  • Implanted piezoelectric ceramic microphone and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Example 1 Preparation of Implantable Piezoelectric Ceramic Microphone

[0036] Biological glue pastes and fixes the preamplifier (LMV1032 type) system on one end of the piezoelectric ceramic bimorph, and the piezoelectric ceramic bimorph is 2.0×width 1.0×0.3mm thick;

[0037] The preamplifier chip is pasted and fixed on one end of the piezoelectric ceramic double chip with epoxy resin, and one position of the piezoelectric ceramic double chip and the preamplifier chip is micro-welded; the preamplifier chip is also connected to the signal output wire, working The power wire and the ground wire are connected by micro-welding, and 3 copper core enameled wires with a diameter of 0.1mm are drawn out, each wire is 200mm long, and then both sides of the package are cured with epoxy resin.

[0038] Place the above components in a square cylindrical shielded copper shell with a wall thickness of 0.1 mm: the shielded copper shell is 3.0 long x 1.6 mm wide x 1.3 mm high and kept in ...

Embodiment 2

[0040] Example 2 Preparation of Implantable Piezoelectric Ceramic Microphone

[0041] Biological glue pastes and fixes the preamplifier (LMV1032 type) system on one end of the piezoelectric ceramic bimorph, and the piezoelectric ceramic bimorph is 4.0×width 1.0×0.3mm thick;

[0042] The preamplifier chip is pasted and fixed on one end of the piezoelectric ceramic double chip with epoxy resin, and one position of the piezoelectric ceramic double chip and the preamplifier chip is micro-welded; the preamplifier chip is also connected to the signal output wire, working The power wire and the ground wire are connected by micro-welding, and 3 copper core enameled wires with a diameter of 0.1mm are drawn out, each wire is 200mm long, and then both sides of the package are cured with epoxy resin.

[0043] Place the above components in a square cylindrical shielded copper shell with a wall thickness of 0.1mm (length 5.0×width 1.6mm×height 1.3mm) and keep it in the center, fill the gap ...

Embodiment 3

[0045] Example 3 Preparation of Implantable Piezoelectric Ceramic Microphone

[0046] Biological glue pastes and fixes the preamplifier (LMV1032 type) system on one end of the piezoelectric ceramic bimorph, and the piezoelectric ceramic bimorph is 6.0mm long x 2.0mm wide x 0.3mm thick;

[0047] The preamplifier chip is pasted and fixed on one end of the piezoelectric ceramic double chip with epoxy resin, and one position of the piezoelectric ceramic double chip and the preamplifier chip is micro-welded; the preamplifier chip is also connected to the signal output wire, working The power wire and the ground wire are connected by micro-welding, and 3 copper core enameled wires with a diameter of 0.1mm are drawn out, each wire is 200mm long, and then both sides of the package are cured with epoxy resin.

[0048] Place the above components in a square cylindrical shielded copper shell with a wall thickness of 0.1mm (length 7.0×width 3mm×height 1.3mm) and keep it in the center, fil...

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Abstract

The invention relates to an implanted piezoelectric ceramic microphone and a manufacturing method thereof, belonging to the field of biomedical engineering bionics. The microphone comprises a piezoelectric ceramic twin lamella, a preamplifier chip and a shielding case. The preamplifier chip is stuck and fixed at one end of the piezoelectric ceramic twin lamella in a stickiness manner by biogum so as to form a fixed component which is arranged in the shielding case; the piezoelectric ceramic twin lamella is connected with one site of the preamplifier chip by micro welding; and the preamplifier chip is also connected with a signal output wire, a working power wire and a grounding wire by micro welding. The microphone can realize the purpose of being implanted in vivo completely by a way of being directly coupled and fixed on malleus, and have higher sensitivity and better frequency response property to the test of pure tone signals between 100 and 20000Hz. Being proved by experiment, the microphone can replace outboard microphone to transmit and convert acoustic signals.

Description

technical field [0001] The invention belongs to the field of bionics of biomedical engineering, and relates to a miniature microphone which can be implanted in the middle ear, in particular to an implantable piezoelectric ceramic microphone and a preparation method thereof. Background technique [0002] The cochlear implants disclosed in the prior art are all semi-implantable, containing external devices such as microphones, batteries, speech processors, and transmitting coils. Related extracorporeal devices bring many inconveniences to cochlear implant users, such as disabled appearance, psychological pressure, inconvenience in daily life, and return to the silent world during sleep. At present, one of the main trends in cochlear implant research and development is the fully implanted cochlear implant, but no breakthrough has been made so far. How to build an external microphone into the body is one of the main bottlenecks in the development of cochlear implants. The rese...

Claims

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Application Information

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IPC IPC(8): H04R17/02H04R1/02H04R31/00
Inventor 迟放鲁康厚墉吴拥真高娜辛渊丛宁潘铁政蒋斌
Owner EYE & ENT HOSPITAL SHANGHAI MEDICAL SCHOOL FUDAN UNIV
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