# US 5,706,152 A · Thin film magnetic head having improved insulation of upper side lead terminal

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- Number: US 5,706,152 A
- Document ID: US5706152A
- Status: Granted
- Kind: A
- Application number: 08/577,194
- Filed: 1995-12-22
- Granted: 1998-01-06
- Earliest claimed: 1994-12-26
- Assignees: NEC Corporation
- Inventors: Hiroaki Honjo; Sinsaku Saitoh
- Web page: https://patentgrep.com/patent/US5706152A

## CPC

- G11B 5/313: {Disposition of layers}
- G11B 5/17: Construction or disposition of windings
- G11B 5/40: Protective measures on heads, e.g. against excessive temperature (G11B5/31 takes precedence; protection against wear G11B5/255 {; protective structure of the head: see under structures, e.g. G11B5/3106})
- G11B: INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER (recording measured values in a way that does not require playback through a transducer G01D9/00; recording or playback apparatus using mechanically marked tape, e.g. punched paper tape, or using unit records, e.g. punched or magnetically marked cards G06K; transferring data from one type of record carrier to another G06K1/18; circuits for coupling output of reproducer to radio receiver H04B1/20; gramophone pick-ups or like acoustic electromechanical transducers or circuits therefor H04R)

## Abstract

In a thin film magnetic head including a substrate, a plurality of organic insulating layers, and a plurality of winding layers alternating with the organic insulating layers, a lead terminal formed by an extension of an uppermost one of the winding layers is covered by two upper ones of the organic insulating layers. An edge of the uppermost one of the two upper organic insulating layers on the lead terminal is outside of an edge of the other beneath the lead terminal.

## Claims

### Claim 1

A thin film magnetic head comprising:
a substrate;
a plurality of patterned organic insulating layers formed over said substrate;
a plurality of winding layers each being sandwiched by two of said organic insulating layers;
a lead terminal being formed by an extension of an uppermost one of said winding layers and being covered by one of said organic insulating layers immediately below said uppermost one of said winding layers and an uppermost one of said organic insulating layers,
an edge of said uppermost one of said organic insulating layers on said lead terminal being outside of an edge of said one of said organic insulating layers under said lead terminal.

### Claim 2 (depends on 1)

The thin film magnetic head as set forth in claim 1, wherein said one of said organic insulating layers covers edges of other organic insulating layers below said one of said organic insulating layers and said lead terminal.

### Claim 3

A thin film magnetic head comprising:
a substrate;
N patterned organic insulating layers formed over said substrate, N being an integer greater than 2;
(N-1) winding layers, each of said winding layers being sandwiched by two of said organic insulating layers, an i-th winding layer of said winding layers being formed on an i-th organic insulating layer of said organic insulating layers, i being an integer greater than zero and less than N;
a lead terminal being formed by an extension of the (N-1)-th winding layer and being covered by the N-th and (N-1)-th organic insulating layers of said organic insulating layers; and
an edge of the N-th organic insulating layer on said lead terminal being outside of an edge of the (N-1)-th organic insulating layer.

### Claim 4 (depends on 3)

The thin film magnetic head as set forth in claim 3, wherein the (N-1)-th organic insulating layer covers edges of the (N-2)-th, (N-3)-th, - - - , and the first organic insulating layers of said organic insulating layers under said lead terminal.