D/A converter circuit, semiconductor device incorporating...

Active solid-state devices (e.g. – transistors – solid-state diode – Field effect device – Having insulated electrode

Reexamination Certificate

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

C257S379000, C257SE29003

Reexamination Certificate

active

07615824

ABSTRACT:
D/A conversion having higher accuracy is provided by improving relative accuracy of the resistance value of resistors which configure a resistor string. A manufacturing method of a D/A converter circuit of the invention comprises the steps of: forming a resistor string11which includes a plurality of resistors R0to R7connected in series with each other between reference voltages, and a plurality of switching elements S0to S3connected with each connection node of the resistors R0to R7, wherein: each of the resistors R0to R7is a thin film element crystallized by linear laser irradiation; disposing all forming parts of the resistors configuring the resistor string11within a laser irradiation area19; and crystallizing all the forming parts of the resistors which are disposed within the laser irradiation area with the same laser shot.

REFERENCES:
patent: 4584025 (1986-04-01), Takaoka et al.
patent: 5365875 (1994-11-01), Asai et al.
patent: 5413958 (1995-05-01), Imahashi et al.
patent: 5432122 (1995-07-01), Chae
patent: 5529951 (1996-06-01), Noguchi et al.
patent: 5589406 (1996-12-01), Kato et al.
patent: 5624851 (1997-04-01), Takayama et al.
patent: 5977897 (1999-11-01), Barnes et al.
patent: 6096581 (2000-08-01), Zhang et al.
patent: 6274414 (2001-08-01), Ogata et al.
patent: 6303963 (2001-10-01), Ohtani et al.
patent: 6380876 (2002-04-01), Nagao
patent: 6420988 (2002-07-01), Azami et al.
patent: 6512469 (2003-01-01), Azami et al.
patent: 6606045 (2003-08-01), Azami et al.
patent: 6693616 (2004-02-01), Koyama et al.
patent: 2001/0010512 (2001-08-01), Azami
patent: 2001/0017618 (2001-08-01), Azami
patent: 2001/0048408 (2001-12-01), Koyama et al.
patent: 2002/0047579 (2002-04-01), Kunii et al.
patent: 2002/0047580 (2002-04-01), Kunii et al.
patent: 2002/0163457 (2002-11-01), Azami et al.
patent: 0 851 438 (1998-07-01), None
patent: 1 851 438 (1998-07-01), None
patent: 2000-138586 (2000-05-01), None
patent: 2000-341125 (2000-12-01), None
Search Report (European Application No. 04008875.9) Dated Sep. 1, 2008.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

D/A converter circuit, semiconductor device incorporating... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with D/A converter circuit, semiconductor device incorporating..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and D/A converter circuit, semiconductor device incorporating... will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-4142791

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.