IE39122L - Citric acid production - Google Patents

Citric acid production

Info

Publication number
IE39122L
IE39122L IE740753A IE75374A IE39122L IE 39122 L IE39122 L IE 39122L IE 740753 A IE740753 A IE 740753A IE 75374 A IE75374 A IE 75374A IE 39122 L IE39122 L IE 39122L
Authority
IE
Ireland
Prior art keywords
contact hole
metal
layer
metal layer
mask material
Prior art date
Application number
IE740753A
Other versions
IE39122B1 (en
Original Assignee
Pfizer
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Pfizer filed Critical Pfizer
Publication of IE39122L publication Critical patent/IE39122L/en
Publication of IE39122B1 publication Critical patent/IE39122B1/en

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
    • C12P—FERMENTATION OR ENZYME-USING PROCESSES TO SYNTHESISE A DESIRED CHEMICAL COMPOUND OR COMPOSITION OR TO SEPARATE OPTICAL ISOMERS FROM A RACEMIC MIXTURE
    • C12P7/00—Preparation of oxygen-containing organic compounds
    • C12P7/40—Preparation of oxygen-containing organic compounds containing a carboxyl group including Peroxycarboxylic acids
    • C12P7/44—Polycarboxylic acids
    • C12P7/48—Tricarboxylic acids, e.g. citric acid
    • C—CHEMISTRY; METALLURGY
    • C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
    • C12N—MICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
    • C12N1/00—Microorganisms, e.g. protozoa; Compositions thereof; Processes of propagating, maintaining or preserving microorganisms or compositions thereof; Processes of preparing or isolating a composition containing a microorganism; Culture media therefor
    • C12N1/14—Fungi; Culture media therefor
    • C12N1/16—Yeasts; Culture media therefor

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Zoology (AREA)
  • Health & Medical Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Genetics & Genomics (AREA)
  • Bioinformatics & Cheminformatics (AREA)
  • Biotechnology (AREA)
  • Biochemistry (AREA)
  • Mycology (AREA)
  • General Health & Medical Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Microbiology (AREA)
  • Medicinal Chemistry (AREA)
  • Botany (AREA)
  • Tropical Medicine & Parasitology (AREA)
  • Biomedical Technology (AREA)
  • Virology (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Internal Circuitry In Semiconductor Integrated Circuit Devices (AREA)
  • Preparation Of Compounds By Using Micro-Organisms (AREA)

Abstract

PURPOSE: To maintain insulating property of a base metal consisting of polyimide and eliminate defective wirings of a semiconductor device by offering a manufacturing method for eliminating only a mask material in such a case that polyimde and mask material such as resist are used together. CONSTITUTION: The method comprises the steps of flattening the surface of a substrate 1 which has generated stepped areas with a wiring metal 2 using a polyimide layer 3, forming a metal layer 4 connected with the wiring metal 2 by burying a contact hole 3c with at least two kinds of layered metal materials, forming a mask material 5 on the upper surface of the metal layer 4 on the contact hole 3c, removing an upper layer 4b of a metal layer 4 arranged in the periphery of the contact hole 3c by the ion milling method, and removing the lower layer 4a of the metal layer 4 arranged in the periphery of the contact hole 3c by the anisotropic etching method with the metal layer 4 on the contact hole 3c used as the mask after the mask material 5 is removed by the ashing method[JPS5013585A]
IE00753/74A 1973-04-30 1974-04-08 Production of citric acid IE39122B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US35589473A 1973-04-30 1973-04-30

Publications (2)

Publication Number Publication Date
IE39122L true IE39122L (en) 1974-10-30
IE39122B1 IE39122B1 (en) 1978-08-02

Family

ID=23399243

Family Applications (1)

Application Number Title Priority Date Filing Date
IE00753/74A IE39122B1 (en) 1973-04-30 1974-04-08 Production of citric acid

Country Status (15)

Country Link
JP (1) JPS5013585A (en)
AR (1) AR198582A1 (en)
AT (1) AT327136B (en)
AU (1) AU476615B2 (en)
BE (1) BE814048A (en)
CS (1) CS174240B2 (en)
DE (1) DE2419605A1 (en)
FR (1) FR2227323B1 (en)
GB (1) GB1403336A (en)
IE (1) IE39122B1 (en)
IL (1) IL44601A0 (en)
IT (1) IT1011246B (en)
LU (1) LU69925A1 (en)
NL (1) NL7405449A (en)
YU (1) YU112074A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5037663A (en) * 1981-10-14 1991-08-06 Colorado State University Research Foundation Process for increasing the reactivity of cellulose-containing materials

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4128574A (en) * 1976-10-04 1978-12-05 General Electric Company Method for making organic polycarboxylic acids

Also Published As

Publication number Publication date
FR2227323A1 (en) 1974-11-22
AR198582A1 (en) 1974-06-28
FR2227323B1 (en) 1978-02-24
IT1011246B (en) 1977-01-20
CS174240B2 (en) 1977-03-31
LU69925A1 (en) 1974-11-21
AU6782174A (en) 1975-10-16
GB1403336A (en) 1975-08-28
ATA336074A (en) 1975-04-15
AT327136B (en) 1976-01-12
IE39122B1 (en) 1978-08-02
BE814048A (en) 1974-10-23
YU112074A (en) 1982-02-28
NL7405449A (en) 1974-11-01
JPS5013585A (en) 1975-02-13
DE2419605A1 (en) 1974-11-14
AU476615B2 (en) 1976-09-30
IL44601A0 (en) 1974-06-30

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