Device “ID” encoding with use of protection devices

Data processing: generic control systems or specific application – Specific application – apparatus or process – Product assembly or manufacturing

Reexamination Certificate

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Reexamination Certificate

active

06772025

ABSTRACT:

BACKGROUND OF THE INVENTION
1. Field of the Invention
The invention relates to integrated circuit testing.
2. Background
In the assembly of component parts (devices) from various suppliers in a package, such as a motherboard of a processor, such parts are generally inventoried, subjected to a quality assurance analysis for fitness, staged in readiness, and assembled into the package. The package is then tested for fitness, both through visual inspections and circuit testing. The visual inspection may involved, for example, a visual confirmation that the correct part is located in the correct place. The circuit testing generally device values (e.g., through current, resistance, capacitance, etc.) component orientation, and circuit content. It is appreciated that in the assembly of a package, it is desirous that the correct and capable part is installed in the package.
Many component parts of a scale of less than four microns (&mgr;m) include an I
2
C bus and associated registers. The I
2
C bus was developed by Philips Semiconductor of Sunnyvale, California. The electrical fitness of a part (device) with an associated I
2
C bus and register may be evaluated through such circuitry.
Generally larger (about 4 &mgr;m or greater) legacy technology necessary, for example, for handling high power conversion applications typically do not contain I
2
C bus technology and the increase pin count associated with such technology is not cost effective to incorporate. Accordingly, what is needed is an alternative for electrically verifying the fitness of a component part (device) that is compatible with larger scale components.


REFERENCES:
patent: 4150331 (1979-04-01), Lacher
patent: 4924175 (1990-05-01), Clinton
patent: 5510947 (1996-04-01), Pellegrini et al.
patent: 6154082 (2000-11-01), Bernard et al.
patent: 6161213 (2000-12-01), Lofstrom
patent: 6211575 (2001-04-01), Hansford
patent: 6297993 (2001-10-01), Chen et al.
patent: 6411480 (2002-06-01), Gauthier et al.
patent: 6490646 (2002-12-01), Leydier

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