GB2412785A - Method for manufacturing a layer lamination integrated fuel cell and the fuel cell itself - Google Patents

Method for manufacturing a layer lamination integrated fuel cell and the fuel cell itself Download PDF

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Publication number
GB2412785A
GB2412785A GB0504788A GB0504788A GB2412785A GB 2412785 A GB2412785 A GB 2412785A GB 0504788 A GB0504788 A GB 0504788A GB 0504788 A GB0504788 A GB 0504788A GB 2412785 A GB2412785 A GB 2412785A
Authority
GB
United Kingdom
Prior art keywords
fuel cell
printed circuit
circuit substrate
current collection
layer lamination
Prior art date
Legal status (The legal status 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 status listed.)
Withdrawn
Application number
GB0504788A
Other versions
GB0504788D0 (en
Inventor
His-Ming Shu
Feng-Yi Deng
Tsang-Ming Chang
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Antig Technology Co Ltd
Original Assignee
Antig Technology Co Ltd
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 Antig Technology Co Ltd filed Critical Antig Technology Co Ltd
Publication of GB0504788D0 publication Critical patent/GB0504788D0/en
Publication of GB2412785A publication Critical patent/GB2412785A/en
Withdrawn legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K1/00—Printed circuits
    • H05K1/16—Printed circuits incorporating printed electric components, e.g. printed resistor, capacitor, inductor
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/02—Details
    • H01M8/0202—Collectors; Separators, e.g. bipolar separators; Interconnectors
    • H01M8/023—Porous and characterised by the material
    • H01M8/0241—Composites
    • H01M8/0245—Composites in the form of layered or coated products
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/02—Details
    • H01M8/0202—Collectors; Separators, e.g. bipolar separators; Interconnectors
    • H01M8/0247—Collectors; Separators, e.g. bipolar separators; Interconnectors characterised by the form
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/02—Details
    • H01M8/0202—Collectors; Separators, e.g. bipolar separators; Interconnectors
    • H01M8/0269—Separators, collectors or interconnectors including a printed circuit board
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/10—Fuel cells with solid electrolytes
    • H01M8/1007—Fuel cells with solid electrolytes with both reactants being gaseous or vaporised
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/10—Fuel cells with solid electrolytes
    • H01M2008/1095—Fuel cells with polymeric electrolytes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/10—Fuel cells with solid electrolytes
    • H01M8/1009—Fuel cells with solid electrolytes with one of the reactants being liquid, solid or liquid-charged
    • H01M8/1011—Direct alcohol fuel cells [DAFC], e.g. direct methanol fuel cells [DMFC]
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K1/00—Printed circuits
    • H05K1/18—Printed circuits structurally associated with non-printed electric components
    • H05K1/182—Printed circuits structurally associated with non-printed electric components associated with components mounted in the printed circuit board, e.g. insert mounted components [IMC]
    • H05K1/185—Components encapsulated in the insulating substrate of the printed circuit or incorporated in internal layers of a multilayer circuit
    • 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/30—Hydrogen technology
    • Y02E60/50—Fuel cells
    • 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Composite Materials (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Fuel Cell (AREA)

Abstract

The present invention provides a method for manufacturing a layer lamination integrated fuel cell. A membrane electrode assembly layer 23 has at least one fuel cell unit. The anode current collection circuitries 211 are formed on a single surface of a printed circuit substrate 21, which contacts anodes of all the fuel cell units. The cathode current collection circuitries 251 are formed on a single surface of a printed current substrate 25, which contacts cathodes of all the fuel cell units. The membrane electrode assembly layer can be tightly placed in between the first printed circuit substrate and the second printed circuit substrate to be a sandwich structure.

Description

241 2785
METHOD FOR MANUFACTURING A LAYER LAMINATION INTEGRATED
FUEL CELL AND THE FUEL CELL ITSELF
FIELD OF THE INVENTION
1] The present invention relates to a method for manufacturing a layer lamination integrated fuel cell, especially to the method for manufacturing a current collection layer of the fuel cell. That is, to separately produce anode current collection circuitries and cathode current collection circuitries on each single surface of printed circuit substrates.
BACKGROUND OF THE INVENTION
10002] The manufacturing methods for the fuel cell in the prior arts are all mainly related to the whole structure of the fuel cell or the technical field of the membrane electrode assembly layer; for the manufacturing method or the structure of the current collection layer is disclosed utilizing graphite, metallic mesh, etc. only. Although the means do manufacture the current collection layer and have functions thereof, the prior arts are still restricted by some conditions for making a small and light cell.
SUMMARY OF THE INVENTION
100031 The primary objective of the present invention is to provide a process for manufacturing a layer lamination integrated fuel cell, which is manufactured by producing individually anode current collection circuitries and cathode current collection circuitries on each single surface of printed circuit substrates by way of the PCB(Printed Circuit Board) process. The second objective of the present invention is to provide a current collection layer for the use of a small, light fuel cell.
10004] To approach the above objectives, the present invention provides the method for manufacturing a layer lamination integrated fuel cell comprising: (a) providing a l membrane electrode assembly layer having at least one fuel cell unit; (b) forming anode current collection circuitries on a single surface, which contacts anodes of all the fuel cell units, of a first printed circuit substrate by way of the PCB process, (c) forming cathode current collection circuitries on a single surface, which contacts cathodes of all the fuel cell units, of a second printed circuit substrate by way of the said PCB process; (d) tightly placing the membrane electrode assembly layer in between the first printed circuit substrate of completing the step (b) and the second printed circuit substrate of completing the step (c) to be as a sandwich structure.
[00051 To achieve the above objectives, the present invention provides a layer lamination integrated fuel cell comprising: a membrane electrode assembly electrode layer having at least one fuel cell unit, a first printed circuit substrate having anode current collection circuitries, wherein the anode current collection circuitries are formed on a single surface, which contacts anodes of all the fuel cell units, of the first printed circuit substrate; a second printed circuit substrate having cathode current collection circuitries, wherein the cathode current collection circuitries are formed on a single surface, which contacts cathodes of all the fuel cell units, of the second printed circuit substrate; wherein the membrane electrode assembly layer can be tightly placed in between the first printed circuit substrate and the second printed circuit substrate to be like a sandwich structure.
BRIEF DESCRIPTION OF THE DRAWINGS
10006] The above objects and advantages of the present invention will become more apparent with reference to the appended drawings wherein: Fig. 1 is a flow chart of the present invention; Fig. 2 is an exploded diagram of a layer lamination integrated fuel cell manufactured by the method of the present invention; Fig. 3 represents a first printed circuit substrate with anode current collection circuitries and serial and parallel circuits of the present invention; Fig. 4 represents a second printed circuit substrate with cathode current collection circuitries and serial and parallel circuits of the present invention; and Fig. 5 represents a structure of combining a fuel flow layer and the layer lamination integrated fuel cell of the present invention.
DETAILED DESCRIPTION OF THE INVENTION
7] Please refer to Fig. 1, which is a flow chart of the present invention; and Fig. 2, which is an exploded diagram of a layer lamination integrated fuel cell manufactured by the method of the present invention. Method 10 for manufacturing the layer lamination integrated fuel cell comprises: step (101): providing a membrane electrode assembly layer 23, that is, the layer 23 is made to coat platinum with the predetermined concentration and platinumlruthenium with the predetermined concentration on the proton exchange membrane and macromolecule material, and to combine a proton exchange membrane, macromolecule catalytic layer and carbon paper by way of lamination. The material of the proton exchange membrane can be DuPont Nation, the method of coating adopts Polyimide Printing. For example, the predetermined concentration of 15mg/cm2 of platinum and the predetermined concentration of 110mg/cm2 of platinum/ruthenium can be manufactured by means of metallic vacuum vapor deposition, continuously to print some mixtures of carbon, Teflon, solvent, etc. by way of halftone printing or flat printing to form the layer 23, which is a membrane electrode assembly layer. The layer 23 comprises a plurality of fuel cell units 23a, please refer to Fig. 2.
10007] Step (103) is to form anode current collection circuitries 211 on a single surface, which contacts the anodes of all the fuel cell units 23a, of a first printed circuit substrate 21 by way of the PCB process. Referring to Fig. 2, the single surface of the first printed circuit substrate 21 is the surface for touching with the anode of each fuel cell unit 23a; another surface relative to the surface for touching the anode is not a key part of the method 10. In the step (103), it is forming anode current collection circuitries 211 on a single surface of a first printed circuit substrate 21 by way of the PCB process. The preferred embodiment is to drill a plurality of holes 217 on the area distributed over the circuitries 211, and the holes 217 function to let anode fuel pass through, and the anode fuel can then be in the fuel cell units 23a. Constantly, to form conductive material as conduction glue, conduction band, metallic lamination, etc. on the first printed circuit lO substrate 21 via coating, printing, adhering, electroplating build-up, etc., or to adopt the process of etching metal of the substrate 21 to produce the circuitries 211. The metal can be copper or other types of metallic material. The present invention having the way of forming anode current collection circuitries 211 on the single surface of the first printed circuit substrate 21 may not be a restriction; any other technical field belonging to the spirit of the present invention shall be in the scope of the present invention.
100081 Step (105) is to form cathode current collection circuitries 251 on a single surface, which contacts the cathodes of all the fuel cell units 23a, of a second printed circuit substrate 25 by way of said PCB process. In Fig. 2, the single surface of the first printed circuit substrate 25 is the surface for touching the cathode of each fuel cell unit 23a; another surface relative to the surface for touching with the cathode is not a key part of the method 10. In step (105), the cathode current collection circuitries 251 are able to be made by way of the method in step (103). Same theory, holes 257 are to let the air pass through, and the air will then be in fuel cell units 23a.
[00091 In the step (107): it is that tightly placing the membrane electrode assembly layer 23 in between the first printed circuit substrate 21 of completing the step (103) and the second printed circuit substrate 25 of completing the step (105) to be as a sandwich structure of a layer lamination integrated fuel cell 20. To laminate the sandwich structure in step (107) it may adopt epoxy, the stacking methods of printing or glue pieces and the laminating method of a thermocompressor to tightly combine together.
[00101 While proceeding to step (103), a further step to form serial and parallel circuits 213 can be engaged, that is, the serial and parallel circuits 213 can be manufactured on the single surface of the first printed substrate 21 via the PCB process.
Since the serial and parallel circuits 213 electrically connecting to the anode current collection circuitries 211, the anodes of the fuel cell units 23a can then be in the connection of serial and parallel from the design of the serial and parallel circuits 213. All other corresponding serial and parallel circuits 213 may be connected as well, and therefore necessary provided voltage for each of fuel cell unit 23a is made successfully.
100111 While proceeding to step (105), a further step to form serial and parallel circuits 253 can be engaged, that is, the serial and parallel circuits 253 can be manufactured on the single surface of the second printed substrate 25 via the PCB process. Since the serial and parallel circuits 253 electrically connecting to the anode current collection circuitries 251, the cathodes of the fuel cell units 23a can then be in the connection of serial and parallel from the design of the serial and parallel circuits 253. All other corresponding serial and parallel circuits 253 may be connected as well, and therefore necessary provided voltage for each of fuel cell unit 23a is made successfully.
100121 After manufacturing the anode current collection circuitries 211, the serial and parallel circuits 213, the cathode current collection circuitries 251 and the serial and parallel circuits 253, an isolating layer 215 and another isolating layer 255 are individually formed on the first printed circuits 21 and the second printed circuits 25. Outside the anode current collection circuitries 211 and the cathode current collection circuitries 251 may be isolated by means of the two isolating layers 215, 255 so as to connect the circuitries 211 and the circuitries 215 to each fuel cell unit 23a only. The preferred embodiment for the isolating layers 215, 255 may coat soldermask paint.
[00131 Fig. 3 represents the first printed circuit substrate with the anode current collection circuitries and the serial and parallel circuits of the present invention, and Fig. 4 represents the second printed circuit substrate with the cathode current collection circuitries and the serial and parallel circuits of the present invention. The first printed circuit substrate 21 and the second circuit substrate 25 can be chosen from one of the following: copper clad laminate, flexible printed circuit board, substrate for the PCB process. Further, the printed circuit substrates in Figs. 3 and 4 can be produced separately, and then to combine with the membrane electrode assembly layer 23 as a sandwich structure.
[00141 Fig. 5 represents a structure of combining a fuel flow layer and the layer lamination integrated fuel cell. The manufactured fuel cell 20 is to combine with the fuel flow layer 30, and an internal room 30a of the fuel flow layer 30 is to be reserved for anode fuel as a methanol solution. The internal room 30a connects to the holes 217 of the anode current collection circuitries 211 as well, and it is for anode fuel going to each fuel cell unit 23a.
1001S1 A preferred embodiment of aforesaid fuel cell 20 is a layer lamination integrated direct methanol fuel cell.
100161 While the invention has been described by way of example and in terms of a preferred embodiment, it is to be understood that the invention is not limited thereto. To the contrary, it is intended to cover various modifications and similar arrangements and procedures, and the scope of the appended claims therefore should be accorded the broadest interpretation so as to encompass all such modifications and similar arrangements and procedures.

Claims (14)

  1. What is claimed is: 1. A method for manufacturing a layer lamination
    integrated fuel cell comprising: (a) providing a membrane electrode assembly layer having at least one fuel cell unit; (b) forming anode current collection circuitries on a single surface of a first printed circuit substrate by way of PCB process, wherein the surface of the first printed circuit substrate is contacted with anodes of all the fuel cell units; (c) forming cathode collecting circuits on a single surface of a second printed circuit substrate of by way of said PCB process, wherein the surface of the second printed circuit substrate is contacted with cathodes of all the fuel cell units; and (d) tightly placing the membrane electrode assembly layer in between the first printed circuit substrate of completing the step (b) and the second printed circuit substrate of completing the step (c) to be a sandwich structure.
  2. 2. The method for manufacturing a layer lamination integrated fuel cell of claim 1, wherein the step (b) further comprises the following step: forming serial and parallel circuits on the single surface with the anode current collection circuitries, wherein the serial and parallel circuits being electrically connected to the anode current collection circuitries.
  3. 3. The method for manufacturing a layer lamination integrated fuel cell of claim I, wherein the step (c) further comprises the following step: forming serial and parallel circuits on the single surface with the cathode current collection circuitries, wherein the serial and parallel circuits being electrically connected to the cathode current collection circuitries.
  4. 4. The method for manufacturing a layer lamination integrated fuel cell of claim 1, wherein the first printed circuit substrate can be one of the following: copper clad laminate, flexible printed circuit board, substrate for the PCB process.
  5. 5. The method for manufacturing a layer lamination integrated fuel cell of claim 1, wherein the second printed circuit substrate can be one of the following: copper clad laminate, flexible printed circuit board, substrate for the PCB process.
  6. 6. The method for manufacturing a layer lamination integrated fuel cell of claim I, wherein the layer lamination integrated fuel cell is a layer lamination integrated direct methanol fuel cell.
  7. 7. A layer lamination integrated fuel cell comprising: a membrane electrode assembly layer having at least one fuel cell unit; a first printed circuit substrate having anode current collection circuitries, wherein the anode current collection circuitries are formed on a single surface of the first printed circuit substrate, and wherein the surface of the first printed circuit substrate is contacted with anodes of all the fuel cell units; a second printed circuit substrate having cathode current collection circuitries, wherein the cathode current collection circuitries are formed on a single surface of the second printed circuit substrate, and wherein the surface of the second printed circuit substrate is contacted with cathodes of all the fuel cell units; wherein the membrane electrode assembly layer can be tightly placed in between the first printed circuit substrate and the second printed circuit substrate to be as a sandwich structure.
  8. 8. The layer lamination integrated fuel. cell of claim 7, wherein the first printed circuit substrate further comprises: serial andiparallel circuits electrically connecting to the anode current collection circuitries are formed on the single surface with the anode current collection circuitries.
  9. 9. The layer lamination integrated fuel cell of claim 7, wherein the second printed circuit substrate further comprises: serial and parallel circuits electrically connecting to the cathode current collection circuitries are formed on the single surface with the cathode current collection circuitries.
  10. 10. The layer lamination integrated fuel cell of claim 7, wherein the first printed circuit substrate can be one of the following: copper clad laminate, flexible printed circuit board, substrate for the PCB process.
  11. l l. The layer lamination integrated fuel cell of claim 7, wherein the second printed circuit substrate can be one of the following: copper clad laminate, flexible printed circuit board, substrate for the PCB process.
  12. 12. The layer lamination integrated fuel cell of claim 7, wherein the layer lamination integrated fuel cell is a layer lamination integrated direct methanol fuel cell.
  13. 13. The method for manufacturing a layer lamination integrated fuel cell substantially as described in relation to Fig. 1 of the accompanying drawings.
  14. 14. The layer lamination integrated fuel cell constructed and arranged substantially as described in relation to Figs. 2-5 of the accompanying drawings.
GB0504788A 2004-04-02 2005-03-09 Method for manufacturing a layer lamination integrated fuel cell and the fuel cell itself Withdrawn GB2412785A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
TW093109318A TW200534527A (en) 2004-04-02 2004-04-02 Manufacturing method of packed integrated fuel cell and the fuel cell thereof

Publications (2)

Publication Number Publication Date
GB0504788D0 GB0504788D0 (en) 2005-04-13
GB2412785A true GB2412785A (en) 2005-10-05

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GB0504788A Withdrawn GB2412785A (en) 2004-04-02 2005-03-09 Method for manufacturing a layer lamination integrated fuel cell and the fuel cell itself

Country Status (4)

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JP (1) JP2005294256A (en)
DE (1) DE102005015020A1 (en)
GB (1) GB2412785A (en)
TW (1) TW200534527A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2506925A (en) * 2012-10-15 2014-04-16 Intelligent Energy Ltd A current collector for a fuel cell

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI385839B (en) * 2009-09-11 2013-02-11 Nec Energy Devices Ltd Stacked battery and method of manufacturing the same

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6541147B1 (en) * 1998-07-01 2003-04-01 Ballard Power Systems Inc. Printed circuit board separator for an electrochemical fuel cell
CA2483079A1 (en) * 2002-05-09 2003-11-20 The Board Of Trustees Of The Leland Stanford Junior University Improved fuel cell

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6541147B1 (en) * 1998-07-01 2003-04-01 Ballard Power Systems Inc. Printed circuit board separator for an electrochemical fuel cell
CA2483079A1 (en) * 2002-05-09 2003-11-20 The Board Of Trustees Of The Leland Stanford Junior University Improved fuel cell

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2506925A (en) * 2012-10-15 2014-04-16 Intelligent Energy Ltd A current collector for a fuel cell
WO2014060728A1 (en) * 2012-10-15 2014-04-24 Intelligent Energy Limited A current collector for a fuel cell
US10038204B2 (en) 2012-10-15 2018-07-31 Intelligent Energy Limited Current collector for a fuel cell

Also Published As

Publication number Publication date
DE102005015020A1 (en) 2005-10-20
JP2005294256A (en) 2005-10-20
GB0504788D0 (en) 2005-04-13
TW200534527A (en) 2005-10-16

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