GB2395072A - Printed circuit board having edge mounted test contacts - Google Patents
Printed circuit board having edge mounted test contacts Download PDFInfo
- Publication number
- GB2395072A GB2395072A GB0225666A GB0225666A GB2395072A GB 2395072 A GB2395072 A GB 2395072A GB 0225666 A GB0225666 A GB 0225666A GB 0225666 A GB0225666 A GB 0225666A GB 2395072 A GB2395072 A GB 2395072A
- Authority
- GB
- United Kingdom
- Prior art keywords
- printed circuit
- circuit board
- contact
- test
- test contact
- 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- Withdrawn
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/28—Testing of electronic circuits, e.g. by signal tracer
- G01R31/2801—Testing of printed circuits, backplanes, motherboards, hybrid circuits or carriers for multichip packages [MCP]
- G01R31/2818—Testing of printed circuits, backplanes, motherboards, hybrid circuits or carriers for multichip packages [MCP] using test structures on, or modifications of, the card under test, made for the purpose of testing, e.g. additional components or connectors
-
- 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
- H05K1/0266—Marks, test patterns or identification means
- H05K1/0268—Marks, test patterns or identification means for electrical inspection or testing
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R12/00—Structural associations of a plurality of mutually-insulated electrical connecting elements, specially adapted for printed circuits, e.g. printed circuit boards [PCB], flat or ribbon cables, or like generally planar structures, e.g. terminal strips, terminal blocks; Coupling devices specially adapted for printed circuits, flat or ribbon cables, or like generally planar structures; Terminals specially adapted for contact with, or insertion into, printed circuits, flat or ribbon cables, or like generally planar structures
- H01R12/70—Coupling devices
- H01R12/71—Coupling devices for rigid printing circuits or like structures
- H01R12/72—Coupling devices for rigid printing circuits or like structures coupling with the edge of the rigid printed circuits or like structures
- H01R12/721—Coupling devices for rigid printing circuits or like structures coupling with the edge of the rigid printed circuits or like structures cooperating directly with the edge of the rigid printed circuits
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R2201/00—Connectors or connections adapted for particular applications
- H01R2201/20—Connectors or connections adapted for particular applications for testing or measuring purposes
-
- 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
- H05K2201/09145—Edge details
- H05K2201/09181—Notches in edge pads
-
- 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
- H05K3/40—Forming printed elements for providing electric connections to or between printed circuits
- H05K3/403—Edge contacts; Windows or holes in the substrate having plural connections on the walls thereof
Landscapes
- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Computer Hardware Design (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Printing Elements For Providing Electric Connections Between Printed Circuits (AREA)
Abstract
A PCB 10 having edge contacts 18,20 for testing of the circuit board. The contacts may include parts 22 that extend onto the working surfaces 12,14 of the PCB.
Description
( _ _ PRINTED CIRCUIT BOARD
The present invention relates to a printed circuit board and, in particular, to a printed circuit board having a test contact for allowing the testing of 5 circuitry and devices mounted on one or both of the working surfaces thereof.
With increasing device miniaturization, the density to which circuitry in components are mounted on printed circuit boards is such that, with, for example, tightly packed components, little access remains for test points and 10 connectors by which the circuitry and components on the printed circuit board can be tested. I Such densely packed printed circuit boards are commonly found, in particular, in current mobile phones where both upper, and lower surfaces of 15 the printed circuit board, i.e. the socalled working surfaces, are tightly packed with components.
Such high density leaves little space for test access which can have disadvantageous cost implication when considering circuitry component 20 testing, or can limit the manner in which the circuitry/components are available for testing.
The present invention seeks to provide for a printed circuit board exhibiting advantages over known such circuit boards.
According to one aspect of the present invention there is provided a printed circuit board having a test contact for connection to test means to allow for the testing of circuitry on the printed circuit board, wherein the said contact is provided on an edge surface of the printed circuit board.
( Providing the test access point on an edge surface of the printed circuit board, i.e. the surface away from both of the aforementioned working surfaces, ease of access for testing procedures is advantageously provided.
5 Advantageously, and in particular to improve the secure mounting of the test contact of the printed circuit board, at least a portion of the printed circuit board can extend onto one of the working surfaces.
The mounting can be further secured by including a portion of the said 10 test contact that extends into a via hole located in an edge region of one of the working surfaces of the printed circuit board.
Yet further, connection from the components/circuitry to the test contact can be achieved by the means of, for example, a metal run being brought from 15 the respective working surface to the edge of the printed circuit board or, alternatively, by way of a via hole such as that which maybe used as noted above in order to assist in securely mounting the test contact to an edge surface of the printed circuit board.
20 As will therefore be appreciated, in plating contacts onto an edge surface of the printed circuit board, this avoids the need to use part of either of the two working surfaces where the circuitry/components required on the printed circuit board are mounted.
25 Advantageously, an edge surface of the printed circuit board is arranged to be plated with copper in order to provide for the said test contact.
The invention is described further hereinafter, by way of example only, with reference to the accompanying drawing which illustrates a perspective 30 view of a printed circuit board illustrating embodiments of the present invention.
( Turning now to the accompanying drawing, there is illustrated a printed circuit board 10, but without circuitry/components shown, and which includes upper 12 and lower 14 working surfaces upon which the components would be mounted in use.
A printed circuit board such as that illustrated, and which is densely packed with components, is commonly found in, for example, mobile radio communication devices.
10 Such printed circuit boards include an edge surface 16 generally orthogonal to the two working surfaces 12,14.
In accordance with the present invention, test contacts 18, 20 are provided on the edge surface 16 of the printed circuit board.
The test contacts 18,20 can advantageously comprise copper contacts plated onto the edge surface 16.
The illustrated contacts 18 comprise mere copper contact pads formed 20 solely on the edge surface 16 of the printed circuit board 10.
In accordance with an alternative embodiment, a copper test connector 20 can be provided which also includes a portion 22 extending onto an edge region of the upper working surface 12 of the printed circuit board 10 so as to 25 improve the security with which the test contact 20 is mounted to the printed circuit board 10.
In a further, but not illustrated embodiment, a portion 22 of the test contact 20 can extend into a via hole so as to further improve the security of 30 mounting of the contact pad 20 onto the printed circuit board 10.
( The use of such a via hole so as to improve the mechanical strength of the mounting of the test contact on to the printed circuit board 10 can also assist in providing a means of electrical contact between the test contact 20 and the components/circuitry to be mounted on the printed circuit board 10 5 and to be tested.
As will be appreciated, the present invention advantageously reduces the area required for test access and so improves the ability to deep bug, for example, mobile phone handsets, were appropriate test access would 10 otherwise have been denied.
Claims (11)
1 A printed circuit board having a test contact for connection to test means to allow for the testing of 5 circuitry on the printed circuit board, wherein the said contact is provided on an edge surface of the printed circuit board.
2 A printed circuit board as claimed in Claim 1, wherein the 10 said contact extends onto at least one working surface of the printed circuit board.
3 A printed circuit board as claimed in Claim 1 or 2, wherein the contact has a portion extending into a via hole in an 15 edge region of the printed circuit board.
4 A printed circuit board as claimed in any one of Claims 1 3, wherein the said test contact comprises a contact pad.
20
5 A printed circuit board as claimed in any one or more of Claims 14, wherein the said test contact comprises a metal plate.
6 A printed circuit board as claimed in any one or more of 25 Claims 1-5, wherein the said test contact is formed of copper.
7 A printed circuit board as claimed in any one or more of Claims 1-6, and including connection for connecting the 30 test contact to circuitry on the printed circuit board, and which connection means extends along an working surface thereof.
(
8 A printed circuit board as claimed in any one or more of Claims 1-7, and including connecting means for connecting the test contact to circuitry/components with a printed circuit board by way of via hole formed in the edge surface region of the working surface of the printed circuit board.
9 A printed circuit board as claimed in any one or more of 10 Claims 1-8 and arranged for use in a mobile radio communications device.
10 A mobile radio communications device having a printed circuit board as claimed in any one or more of Claims 1-8.
11 A printed circuit board having a test contact for connection to test means and substantially as hereinbefore described with reference to, and as illustrated in, the accompanying drawings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB0225666A GB2395072A (en) | 2002-11-04 | 2002-11-04 | Printed circuit board having edge mounted test contacts |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB0225666A GB2395072A (en) | 2002-11-04 | 2002-11-04 | Printed circuit board having edge mounted test contacts |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB0225666D0 GB0225666D0 (en) | 2002-12-11 |
| GB2395072A true GB2395072A (en) | 2004-05-12 |
Family
ID=9947157
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB0225666A Withdrawn GB2395072A (en) | 2002-11-04 | 2002-11-04 | Printed circuit board having edge mounted test contacts |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2395072A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10041989B2 (en) * | 2016-03-09 | 2018-08-07 | Panasonic Liquid Crystal Display Co., Ltd. | Circuit board with inspection terminals |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DD247546A1 (en) * | 1986-04-01 | 1987-07-08 | Zeiss Jena Veb Carl | CONNECTED CONTACT LADDER PLATE |
| EP0395609A1 (en) * | 1989-04-12 | 1990-10-31 | Nokia Mobile Phones Ltd. | Surface connector for radio frequency signals |
| US5244395A (en) * | 1992-07-29 | 1993-09-14 | Motorola, Inc. | Circuit interconnect system |
-
2002
- 2002-11-04 GB GB0225666A patent/GB2395072A/en not_active Withdrawn
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DD247546A1 (en) * | 1986-04-01 | 1987-07-08 | Zeiss Jena Veb Carl | CONNECTED CONTACT LADDER PLATE |
| EP0395609A1 (en) * | 1989-04-12 | 1990-10-31 | Nokia Mobile Phones Ltd. | Surface connector for radio frequency signals |
| US5244395A (en) * | 1992-07-29 | 1993-09-14 | Motorola, Inc. | Circuit interconnect system |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10041989B2 (en) * | 2016-03-09 | 2018-08-07 | Panasonic Liquid Crystal Display Co., Ltd. | Circuit board with inspection terminals |
Also Published As
| Publication number | Publication date |
|---|---|
| GB0225666D0 (en) | 2002-12-11 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |