Data processing: generic control systems or specific application – Specific application – apparatus or process – Product assembly or manufacturing
Patent
1998-02-26
2000-04-04
Grant, William
Data processing: generic control systems or specific application
Specific application, apparatus or process
Product assembly or manufacturing
702 65, G11B 5127, G11B 539
Patent
active
060472243
ABSTRACT:
An electrical lap guide (ELG) and a method of using the same to control the machining of a surface of a magnetic transducer to obtain a desired transducer height are disclosed. The transducer and ELG are fabricated in a deposition of layers on a substrate. The ELG includes a first resistor aligned with the transducer such that a machined height of the first resistor is indicative of a machined height of the transducer. Resistances of second and third resistors of the ELG are measured. A sheet resistance of the deposition of layers and a quantity of wafer processing edge movement are determined as functions of the measured resistances of the second and third resistors. An expected non-machined resistance of the first resistor is determined as a function of the determined sheet resistance and as a function of the determined quantity of edge movement. A non-machined resistance of the first resistor is measured. The expected non-machined resistance of the first resistor is compared to the measured non-machined resistance of the first resistor to determine an amount of error.
REFERENCES:
patent: 3710235 (1973-01-01), Barrager et al.
patent: 4457114 (1984-07-01), Hennenfent et al.
patent: 4477968 (1984-10-01), Kracke et al.
patent: 4536992 (1985-08-01), Hennenfent et al.
patent: 4559743 (1985-12-01), Kracke et al.
patent: 4689877 (1987-09-01), Church
patent: 4912883 (1990-04-01), Chang et al.
patent: 5023991 (1991-06-01), Smith
patent: 5065483 (1991-11-01), Zammit
patent: 5175938 (1993-01-01), Smith
patent: 5361547 (1994-11-01), Church et al.
patent: 5463805 (1995-11-01), Mowry et al.
patent: 5494473 (1996-02-01), Dupuis et al.
patent: 5755612 (1998-05-01), Schaenzer et al.
patent: 5816890 (1998-10-01), Hao et al.
patent: 5991698 (1999-11-01), Hao et al.
G.P. Carver, L.W. Linholm, and T.J. Russell, "Use of Microelectronic Test Structures to Characterize IC Materials, Processes, and Processing Equipment", Solid State Technology, Sep., 1990, pp. 85-92.
Hao Shanlin X.
Keel Beat G.
Stover Lance E.
Bahta Kidest
Grant William
Seagate Techology, Inc.
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