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GB2223885B - Improvements relating to circuit boards - Google Patents

Improvements relating to circuit boards

Info

Publication number
GB2223885B
GB2223885B GB8922700A GB8922700A GB2223885B GB 2223885 B GB2223885 B GB 2223885B GB 8922700 A GB8922700 A GB 8922700A GB 8922700 A GB8922700 A GB 8922700A GB 2223885 B GB2223885 B GB 2223885B
Authority
GB
United Kingdom
Prior art keywords
circuit boards
improvements relating
relating
boards
circuit
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.)
Expired - Lifetime
Application number
GB8922700A
Other versions
GB2223885A (en
GB8922700D0 (en
Inventor
Howard Lawrence
David Brian Joyce
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.)
Balfour Beatty PLC
Original Assignee
BICC PLC
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 BICC PLC filed Critical BICC PLC
Publication of GB8922700D0 publication Critical patent/GB8922700D0/en
Publication of GB2223885A publication Critical patent/GB2223885A/en
Application granted granted Critical
Publication of GB2223885B publication Critical patent/GB2223885B/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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
    • H05K3/00—Apparatus or processes for manufacturing printed circuits
    • H05K3/02—Apparatus or processes for manufacturing printed circuits in which the conductive material is applied to the surface of the insulating support and is thereafter removed from such areas of the surface which are not intended for current conducting or shielding
    • H05K3/06—Apparatus or processes for manufacturing printed circuits in which the conductive material is applied to the surface of the insulating support and is thereafter removed from such areas of the surface which are not intended for current conducting or shielding the conductive material being removed chemically or electrolytically, e.g. by photo-etch process
    • H05K3/061—Etching masks
    • H05K3/062—Etching masks consisting of metals or alloys or metallic inorganic compounds
    • 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
    • H05K1/02—Details
    • H05K1/0286—Programmable, customizable or modifiable circuits
    • H05K1/0287—Programmable, customizable or modifiable circuits having an universal lay-out, e.g. pad or land grid patterns or mesh patterns
    • 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
    • H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
    • H05K2201/09—Shape and layout
    • H05K2201/09209—Shape and layout details of conductors
    • H05K2201/095—Conductive through-holes or vias
    • H05K2201/09609—Via grid, i.e. two-dimensional array of vias or holes in a single plane
    • 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
    • H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
    • H05K2201/09—Shape and layout
    • H05K2201/09818—Shape or layout details not covered by a single group of H05K2201/09009 - H05K2201/09809
    • H05K2201/09945—Universal aspects, e.g. universal inner layers or via grid, or anisotropic interposer

Landscapes

  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Metallurgy (AREA)
  • Manufacturing & Machinery (AREA)
  • Structure Of Printed Boards (AREA)
  • Printing Elements For Providing Electric Connections Between Printed Circuits (AREA)
GB8922700A 1988-10-11 1989-10-09 Improvements relating to circuit boards Expired - Lifetime GB2223885B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB888823771A GB8823771D0 (en) 1988-10-11 1988-10-11 Improvements relating to circuit boards

Publications (3)

Publication Number Publication Date
GB8922700D0 GB8922700D0 (en) 1989-11-22
GB2223885A GB2223885A (en) 1990-04-18
GB2223885B true GB2223885B (en) 1992-08-12

Family

ID=10644985

Family Applications (2)

Application Number Title Priority Date Filing Date
GB888823771A Pending GB8823771D0 (en) 1988-10-11 1988-10-11 Improvements relating to circuit boards
GB8922700A Expired - Lifetime GB2223885B (en) 1988-10-11 1989-10-09 Improvements relating to circuit boards

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB888823771A Pending GB8823771D0 (en) 1988-10-11 1988-10-11 Improvements relating to circuit boards

Country Status (3)

Country Link
DE (2) DE8912086U1 (en)
FR (1) FR2642930A1 (en)
GB (2) GB8823771D0 (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2092830A (en) * 1981-02-09 1982-08-18 Int Computers Ltd Multilayer Printed Circuit Board
EP0145549A2 (en) * 1983-11-15 1985-06-19 Thomson-Csf Printed circuit board with marks
GB2216727A (en) * 1988-02-19 1989-10-11 Bicc Plc An improved circuit board

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2331629A1 (en) * 1973-06-22 1975-01-16 Philips Patentverwaltung Pressure operated switch - has apertured support plate overlaid by conductive foil with probe for pressing foil through hole
DK111577A (en) * 1977-03-15 1978-09-16 I O Pedersen ELECTRICAL CIRCUIT PLATE

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2092830A (en) * 1981-02-09 1982-08-18 Int Computers Ltd Multilayer Printed Circuit Board
EP0145549A2 (en) * 1983-11-15 1985-06-19 Thomson-Csf Printed circuit board with marks
GB2216727A (en) * 1988-02-19 1989-10-11 Bicc Plc An improved circuit board

Also Published As

Publication number Publication date
GB8823771D0 (en) 1988-11-16
GB2223885A (en) 1990-04-18
GB8922700D0 (en) 1989-11-22
DE3933981A1 (en) 1990-04-12
FR2642930A1 (en) 1990-08-10
DE8912086U1 (en) 1989-12-14

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19931009