US3729342A - Method of manufacturing a radiation-sensitive electronic device - Google Patents

Method of manufacturing a radiation-sensitive electronic device Download PDF

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Publication number
US3729342A
US3729342A US00024556A US3729342DA US3729342A US 3729342 A US3729342 A US 3729342A US 00024556 A US00024556 A US 00024556A US 3729342D A US3729342D A US 3729342DA US 3729342 A US3729342 A US 3729342A
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United States
Prior art keywords
grains
radiation
layer
metal
permeable
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Expired - Lifetime
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US00024556A
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English (en)
Inventor
Velde T Te
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US Philips Corp
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US Philips Corp
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Publication date
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Publication of US3729342A publication Critical patent/US3729342A/en
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    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B33/00—Electroluminescent light sources
    • H05B33/10—Apparatus or processes specially adapted to the manufacture of electroluminescent light sources
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B33/00—Electroluminescent light sources
    • H05B33/12—Light sources with substantially two-dimensional radiating surfaces
    • H05B33/26—Light sources with substantially two-dimensional radiating surfaces characterised by the composition or arrangement of the conductive material used as an electrode
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S148/00—Metal treatment
    • Y10S148/107—Melt
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S428/00—Stock material or miscellaneous articles
    • Y10S428/917—Electroluminescent

Definitions

  • the invention relates to a method of manufacturing a radiation-sensitive or electroluminescent electronic device which comprises a foil consisting of radiation-sensitive or electroluminescent grains, for example, semiconductor grains which are incorporated in an insulating binder surface portions of said grains being free from the binder on at least one side of the foil, said foil being covered at least on said side with a contact layer which electrically interconnects said grains, the contact layer being permeable to radiation to which the grains are sensitive or which can be emitted by the grains.
  • a radiation-sensitive or electroluminescent electronic device which comprises a foil consisting of radiation-sensitive or electroluminescent grains, for example, semiconductor grains which are incorporated in an insulating binder surface portions of said grains being free from the binder on at least one side of the foil, said foil being covered at least on said side with a contact layer which electrically interconnects said grains, the contact layer being permeable to radiation to which the grains are sensitive or which can be emitted by the grains.
  • the invention furthermore relates to a device manufactured by using the method according to the invention.
  • Devices as described above are known, and may be used, for example, in radiation detectors, photoresstors, solar batteries and electroluminescent panels. Ihe said radiation may be of an electromagnetic or corpuscular nature.
  • the grains In manufacturing such a device, on the one hand the grains must be fixed upon forming the foil while on the other hand the radiation-permeable contact layer must be provided on the foil in such manner that a good electric contact with the grains is obtained.
  • One of the objects of the invention is to provide a very simple method in which the desirable result is obtained with a minimum number of operation steps.
  • the invention is based inter alia on the discovery that by using a comparatively low-melting-point metal layer and making use of capillary forces, the fixing of the grains and the provision of a radiation-permeable contact layer in good electric contact with the grains can be carried out in one operation step.
  • a method of the type mentioned in the preamble is therefore characterized in that on a first electrically conductive layer which is permeable to the said radiation a second layer is provided of a metal which, in the melted condition, Wets the first layer less readily than the grains, the grains are spread on the second layer, the metal of the second layer is then melted and contracts between the grains and the first layer due to the occurring capillary forces and is substantially removed from the parts of the first layer situated between the grains, that after cooling the non-adhered grains are removed and that a binder permeable to said radiation is then provided in the spaces between the grains.
  • the thickness of the metal layer must be chosen to be so that the grainscannot entire sink away in the metal.
  • Metals for fixing and contacting the grains are those metals and alloys having a lower melting-point than the grains and the first radiation-permeable conductive layer. Particularly useful are metals those having a melting point below 1000 C., for example, Zn, Cd, Ga, In, Tl, Sn, Pb, Sb, Bi and Te.
  • the metals chosen are those which readily wet the grains and therefore can give a good adhesion and a good electric contact with the grains.
  • low melting-point metals which have an undesired reaction with the materials with which they are contacted, cannot be used.
  • Light-permeable conductive oxide layers can be used for the said first radiation-permeable conductive layer.
  • layers of tin oxide and/or indium oxide which can be realized by spraying with a solution of tin chloride and indium chloride, respectively, or by vapour deposition in known manner.
  • the electric conductivity is effected by additions, such as antimony or boron, or as a result of deviations from the stoichiometric composition caused during the provision.
  • thin light-permeable metal layers for example, gold layers, may be used in many cases.
  • the first radiation-permeable conductive layer will be provided on a support during the manufacture. If this support is at best sparingly permeable to the said radiation, it will have t0 be removed at the end of the operation. According to an important preferred embodiment, however, the first layer is provided on a support which is permeable to the said radiation and need therefore not be removed from the foil.
  • composition of the first transparent layer must be chosen to be such as not to dissolve in an undesired manner in the metal to be used.
  • the possibility of choice is so wide than in this respect no difficulties need to occur.
  • FIG. 1 is a diagrammatic cross-sectional view of a stage of the method according to the invention.
  • FIG. 2 is a diagrammatic cross-sectional view of a device manufactured by using the method according to the invention.
  • a layer of indium oxide 2 is vapour-deposited on a glass support as shown in FIG. 1. This is carried out by evaporating indium oxide at C. in an atmosphere which contains oxygen at a pressure of 5.10-4 mm. mercury.
  • the support 1 is kept at a temperature of 300 C.
  • a layer 2 is obtained which is light-permeable and electrically conductive.
  • Zinc selenide 4 in powder form having an average grain size of 30 um. is scattered on said layer.
  • the cadmium 3 which forms an ohmic contact with the grains is drawn away from the iridium oxide between the grains by the occurring capillary forces, and interruptions are formed in the metal layer 3. As a result of this, transmission of radiation from and to the grains 4 can take place.
  • the layer of grains 4 is then impregnated with a mixture of components which form a polyurethane 6. After partial hardening of the polyurethane the grain surfaces are cleaned by etching with an alcoholic lye solution and entirely hardened.
  • the resulting assembly may be used, for example, as an electroluminescent panel.
  • a photosensitive or radiating rectifying contact instead of an ohmic contact can be obtained between the metal 3 and the grains 4, an ohmic contact being preferably e'iected between the metal 7 and the grains 4.
  • the contact layer 7 may be omitted, if desirable, for example, if in the operating condition on this side of the foil charge transport from or to the grains takes place in a diierent manner, for example, by an electron or iron beam, an electrolyte or analogous charge-transporting means.
  • a method of manufacturing a radiation-sensitive electronic device having electrically responsive grains of a radiation-sensitive material incorporated in an insulating binder comprising the steps of depositing on a support a iirst electrically-conductive radiation permeable layer,

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Electrodes Of Semiconductors (AREA)
  • Photovoltaic Devices (AREA)
  • Electroluminescent Light Sources (AREA)
  • Led Devices (AREA)
US00024556A 1969-04-16 1970-04-01 Method of manufacturing a radiation-sensitive electronic device Expired - Lifetime US3729342A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL6905835A NL6905835A (fr) 1969-04-16 1969-04-16

Publications (1)

Publication Number Publication Date
US3729342A true US3729342A (en) 1973-04-24

Family

ID=19806702

Family Applications (1)

Application Number Title Priority Date Filing Date
US00024556A Expired - Lifetime US3729342A (en) 1969-04-16 1970-04-01 Method of manufacturing a radiation-sensitive electronic device

Country Status (10)

Country Link
US (1) US3729342A (fr)
JP (1) JPS4826985B1 (fr)
BE (1) BE748953A (fr)
BR (1) BR7018222D0 (fr)
CH (1) CH506166A (fr)
DE (1) DE2016211C3 (fr)
ES (1) ES378556A1 (fr)
FR (1) FR2043297A5 (fr)
GB (1) GB1301585A (fr)
NL (1) NL6905835A (fr)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4169739A (en) * 1978-04-12 1979-10-02 Semix, Incorporated Method of making silicon-impregnated foraminous sheet by partial immersion and capillary action
US4171991A (en) * 1978-04-12 1979-10-23 Semix, Incorporated Method of forming silicon impregnated foraminous sheet by immersion
US4174234A (en) * 1978-04-12 1979-11-13 Semix, Incorporated Silicon-impregnated foraminous sheet
US4357368A (en) * 1978-12-26 1982-11-02 Rca Corporation Method of making a photosensitive electrode and a photosensitive electrode made thereby
US4486499A (en) * 1980-06-13 1984-12-04 Futaba Denshi Kogyo Kabushiki Kaisha Electroluminescent device
US4647337A (en) * 1984-12-03 1987-03-03 Luminescent Electronics, Inc. Method of making electroluminescent panels
US4661742A (en) * 1983-11-29 1987-04-28 Thomson-Csf Luminescent screen and a method of fabrication of said screen
US4767966A (en) * 1984-12-03 1988-08-30 Luminescent Electronics, Inc. Electroluminescent panels
US4853079A (en) * 1984-12-03 1989-08-01 Lumel, Inc. Method for making electroluminescent panels
US4904901A (en) * 1984-12-03 1990-02-27 Lumel, Inc. Electrolumescent panels

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4169739A (en) * 1978-04-12 1979-10-02 Semix, Incorporated Method of making silicon-impregnated foraminous sheet by partial immersion and capillary action
US4171991A (en) * 1978-04-12 1979-10-23 Semix, Incorporated Method of forming silicon impregnated foraminous sheet by immersion
US4174234A (en) * 1978-04-12 1979-11-13 Semix, Incorporated Silicon-impregnated foraminous sheet
US4357368A (en) * 1978-12-26 1982-11-02 Rca Corporation Method of making a photosensitive electrode and a photosensitive electrode made thereby
US4486499A (en) * 1980-06-13 1984-12-04 Futaba Denshi Kogyo Kabushiki Kaisha Electroluminescent device
US4661742A (en) * 1983-11-29 1987-04-28 Thomson-Csf Luminescent screen and a method of fabrication of said screen
US4647337A (en) * 1984-12-03 1987-03-03 Luminescent Electronics, Inc. Method of making electroluminescent panels
US4767966A (en) * 1984-12-03 1988-08-30 Luminescent Electronics, Inc. Electroluminescent panels
US4853079A (en) * 1984-12-03 1989-08-01 Lumel, Inc. Method for making electroluminescent panels
US4904901A (en) * 1984-12-03 1990-02-27 Lumel, Inc. Electrolumescent panels

Also Published As

Publication number Publication date
NL6905835A (fr) 1970-10-20
DE2016211B2 (de) 1978-10-12
DE2016211C3 (de) 1979-06-13
BR7018222D0 (pt) 1973-03-15
JPS4826985B1 (fr) 1973-08-17
DE2016211A1 (fr) 1970-10-22
FR2043297A5 (fr) 1971-02-12
BE748953A (fr) 1970-10-14
ES378556A1 (es) 1972-07-16
CH506166A (de) 1971-04-15
GB1301585A (fr) 1972-12-29

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