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Title:
METHOD FOR FORMING FINE CONDENSING LENS
Document Type and Number:
Japanese Patent JP2003098649
Kind Code:
A
Abstract:

To provide a method for forming a lens having a good design shape so as to attain high efficiency in condensing light, as for a method for forming a fine condensing lens on an image sensor part such as a CCD and a CMOS.

As for the method for forming the fine condensing lens on the light receiving part of the image sensor such as the CCD and the CMOS, a resist film is applied on a planarized layer formed on the light receiving part of the image sensor, and the resist film is exposed and developed via a photomask so as to attain the patterning of a lens shape, and the photomask is a transmissive type photomask with no light shielding layer, and the photomask is provided with a light-transmissive part, wherein the phase of transmitted light in each position is controlled at a prescribed width unit so as to obtain a desired light intensity distribution on the surface of a part to be exposed, and constituted of a light refractive medium having step parts on the surface part.


Inventors:
TAKAHASHI YOICHI
TOYAMA NOBUTO
MATSUI HIROYUKI
Application Number:
JP2001292725A
Publication Date:
April 04, 2003
Filing Date:
September 26, 2001
Export Citation:
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Assignee:
DAINIPPON PRINTING CO LTD
International Classes:
G02B3/00; G03F1/00; G03F1/68; G03F7/20; H01L27/14; H01L27/148; H01L27/146; (IPC1-7): G03F1/08; G02B3/00; G03F7/20; H01L27/14
Domestic Patent References:
JPH04225278A1992-08-14
JPH1059746A1998-03-03
JP2000089014A2000-03-31
JPH07106237A1995-04-21
Foreign References:
WO2000076002A12000-12-14
Attorney, Agent or Firm:
Satoshi Kanayama