WO2002067002A1 - Verfahren und vorrichtung zur qualitätsprüfung von leiterplatten - Google Patents
Verfahren und vorrichtung zur qualitätsprüfung von leiterplatten Download PDFInfo
- Publication number
- WO2002067002A1 WO2002067002A1 PCT/DE2002/000610 DE0200610W WO02067002A1 WO 2002067002 A1 WO2002067002 A1 WO 2002067002A1 DE 0200610 W DE0200610 W DE 0200610W WO 02067002 A1 WO02067002 A1 WO 02067002A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- circuit board
- data
- printed circuit
- surface structure
- deviations
- Prior art date
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
- G01R31/302—Contactless testing
- G01R31/308—Contactless testing using non-ionising electromagnetic radiation, e.g. optical radiation
- G01R31/309—Contactless testing using non-ionising electromagnetic radiation, e.g. optical radiation of printed or hybrid circuits or circuit substrates
Definitions
- the present invention relates to a method and a device for quality testing of printed circuit boards, according to the respective preamble of claims 1 and 10, respectively.
- test adapter A special test algorithm is used for the electrical test using the test adapter. If, for example, a conductor is narrowed, this is acknowledged with the test result "error-free", i.e. such production errors are not recognized. Parasitic approaches are also not recognized, which can lead to unusable products, particularly in the case of circuits for high-frequency applications. Likewise, non-centric holes are not recognized as errors.
- the invention has for its object a method and an apparatus of the above. Provide ways that are improved in terms of reliability and flexibility of the quality inspection with reduced costs at the same time.
- test method according to the invention can be used quickly, easily and inexpensively between all production steps, series production errors can be excluded. This achieves a significant production advantage with the expensive multilayer printed circuit boards. Due to the easy manageability of data, large quantities of different test objects can be stored in a small space. In addition, it is possible to meet the quality-related requirements, for example in aerospace technology. In addition, proof of quality can be provided for all individual manufacturing processes for each individual product.
- the recorded data as well as the data of the target state are preferably data in digital form.
- step (d) the deviations are expediently compared with corresponding tolerance bands, and depending on this comparison, a test result is generated “error-free” for the printed circuit board if the deviations are within the tolerance bands, or “defective” if the Deviations are at least partially outside the tolerance bands.
- the surface structure and / or deep structure is detected in step (a) by means of electromagnetic waves reflected from and / or transmitted by the surface, in particular in the frequency spectrum of visible light, X-rays, radar rays, microwave rays and / or infrared radiation ,
- step (a) From corresponding changes in temperature over time, one can conclude from the structural conditions at the surface and in depth that heat radiation emitted by the surface is detected in step (a) and in step (b) from a change in the heat radiation via the Time the surface structure and / or depth structure is analyzed.
- step (a) To carry out a dynamic measurement, the circuit board is heated or cooled during the measurement in step (a).
- step (a) the detection in step (a) is carried out by means of a thermo-optical difference measurement.
- step (b) The deviations from step (b) are stored on a mass storage device for appropriate circuit board-specific documentation.
- a test that can be carried out particularly quickly is achieved by the data of the desired state of the surface structure being a layout of the printed circuit board designed during the planning.
- a device of the above. Art is characterized according to the invention by a sensor for detecting a radiation emanating from a surface of the circuit board, a device for converting the detected radiation into data which represent a surface structure and / or depth structure of the circuit board, a device for comparing the data of the surface structure and / or the deep structure with stored data of a desired state of the surface structure and / or deep structure and a device for determining deviations between the data of the detected surface structure and / or deep structure and the data of the desired state of the surface structure and / or deep structure.
- test method according to the invention can be used quickly, easily and inexpensively between all production steps, series error productions can be excluded. This achieves a significant production advantage with the expensive multilayer printed circuit boards. Due to the easy manageability of data, large quantities of different test objects can be stored in a small space. In addition, it is possible to meet the quality-related requirements, for example in aerospace technology. In addition, proof of quality can be provided for all individual manufacturing processes for each individual product.
- the recorded data as well as the data of the target state are preferably data in digital form.
- a device for comparing the deviations with corresponding tolerance bands is expediently provided, which, depending on this comparison, generates a test result "error-free" for the printed circuit board if the deviations are within the tolerance bands, or "error-prone” if the deviations are at least partially are outside the tolerance bands.
- the senor is designed to detect electromagnetic waves, in particular in the frequency spectrum of visible light, X-rays, radar rays, microwave rays or infrared radiation, and is arranged in such a way that it detects electromagnetic waves reflected by and / or transmitted by the printed circuit board ,
- the sensor is designed to detect heat radiation from the surface of the printed circuit board and the device for converting the detected radiation into data which represent a surface structure and / or deep structure of the printed circuit board is designed such that this device changes the heat radiation via the Time at a specific location on the circuit board and / or the surface structure and / or depth structure is analyzed via the surface of the circuit board.
- a device for cooling or heating the circuit board during the measurement in particular a laser, is provided for carrying out a dynamic measurement.
- the device is designed to carry out a thermo-optical difference measurement.
- the device additionally has a mass memory for storing the deviations.
- the senor is at least a pyro sensor or a thermal imaging camera.
- the sensor comprises a laser.
- test station that can be set up quickly, easily and inexpensively is achieved in that the device for converting, the device for comparing and the device for determining deviations are designed in a computer. This means that only software and a database have to be adapted to the circuit board to be specifically tested. Hardware adaptation of the test device to the layout of the circuit board is completely eliminated.
- FIG. 1 shows a schematic block diagram of an exemplary embodiment of a device according to the invention for executing the method according to the invention.
- These deviations are stored in a mass memory 26 and fed to a device 28 for comparing the deviations with corresponding tolerance bands, which are stored in a memory 30.
- the device 28 for the printed circuit board 14 generates the test result “error-free” if the deviations are within the tolerance bands, or “faulty” if the deviations are at least partially outside the tolerance bands.
- This test result is stored on the mass storage device 26, displayed on a display device 32, fed to a printer 34 which prints out a log online, and is passed on to a process control 36.
- the process control 36 automatically sorts the printed circuit board 12 out of the production line if it receives the test result "faulty" from the device 28.
- the sensor 18 is, for example, an optical sensor which records electromagnetic waves 38 from the visible spectrum, infrared range, X-rays, radar rays after reflection on the surface structure 14 of the printed circuit board 12 and feeds them to an image processing or image recognition device 16.
- the test device 10 Because of the simple and inexpensive construction of the test device 10, it may be provided for the printed circuit board 12 at several points in the production process. For example, in the manufacture of printed circuit boards 12 with multiple Ren layers after each layer production, the surface structure 14 are checked.
- the comparison data in the memory 24 are the data of the layout from the design of the printed circuit board 12.
- Today, this design is produced exclusively by computer, so that this layout data is immediately available as digital data and, if appropriate, is only converted accordingly for the comparison in the device 22 Need to become.
- the sensor 18 is used to query a material structure 14 of the printed circuit board 12 as an actual value without contact and to compare it with a target value, namely the layout data of the CAD design of the printed circuit board.
- the tolerance bands in memory 30 then specify permissible deviations of the actual values according to the detected surface structure from the target values according to data memory 24. If values fall outside the tolerance bands, the circuit board 12 is classified as faulty by the device 28 and can be pulled out of the ongoing process immediately. Possibly.
- the process controller 36 provides a correction of process parameters in order to counteract a systematic error on the printed circuit boards 12. If it is necessary for service personnel to intervene in the production process, the process control 36 stops the production and gives a corresponding indication. This effectively prevents undesirable and possibly costly production of rejects.
- the method according to the invention and the device according to the invention carry out the test without contact. Since no mechanical contacts between the test device 10 and the test object, namely the printed circuit board 12, are necessary, the test device 10 does not have to adapt the hardware to the layout of the printed circuit board 12. The only adaptation takes place at the software level, in particular with the data in the memories 24 and 30.
- the testing device 10 can be adapted to changes in the layout by simple mouse clicks.
- the printout from the printer 34 and the data in the memory 26 are used for documentation, it being possible in a simple manner to also subsequently carry out all the test results from various points in the production process. lent to a specific circuit board. In this way, a complete test report with proof of correct production can be attached to the finished printed circuit board.
- the data in the mass storage device 26 can be stored indefinitely without special storage costs and possibly made available worldwide via the Internet.
- An interface between sensor and computer only has to be created once and is independent of the type and layout of the circuit board.
- thermo-optical difference measurement is particularly preferred.
- heat radiation emanating from the surface of the printed circuit board 12 is detected by the sensor 18 and evaluated in the device 16.
- Conclusions can be drawn here both on the surface structure and on the depth structure of the printed circuit board 12.
- the printed circuit board 12 is heated and the change in the heat radiation is determined at certain locations, i.e. in other words, a warming gradient.
- vias in the circuit board i.e. in general in the broadest sense the depth structure within the circuit board can be checked.
- a fully developed through-contact will heat up more slowly than an incomplete via, so that the latter can be identified in a contactless, simple and quick manner.
- the change in heat radiation over time during cooling can also be recorded after the circuit board has been heated.
- a complete plated-through hole will cool down more slowly than an incomplete plated-through hole because of the larger mass, which contains a larger amount of heat, so that the last-mentioned faults on the printed circuit board 12 can be determined easily, quickly, contactlessly and non-destructively even after the printed circuit board 12 has been completed are.
Abstract
Description
Claims
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP02714042A EP1364222A1 (de) | 2001-02-22 | 2002-02-20 | Verfahren und vorrichtung zur qualitätsprüfung von leiterplatten |
CA002439167A CA2439167A1 (en) | 2001-02-22 | 2002-02-20 | Method and device for testing the quality of printed circuits |
JP2002566675A JP2004522967A (ja) | 2001-02-22 | 2002-02-20 | プリント配線板の品質検査方法及び装置 |
BR0207772-8A BR0207772A (pt) | 2001-02-22 | 2002-02-20 | Procedimento e dispositivo para a verificação de circuitos eletrônicos ou componentes dos mesmos em uma placa de circuitos impressos |
DE10290637T DE10290637D2 (de) | 2001-02-22 | 2002-02-20 | Verfahren und Vorrichtung zur Qualitätsprüfung von Leiterplatten |
US10/468,712 US6881595B2 (en) | 2001-02-22 | 2002-02-20 | Method of and apparatus for testing the quality of printed circuits |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10108550 | 2001-02-22 | ||
DE10108550.8 | 2001-02-22 | ||
DE10113523.8 | 2001-03-20 | ||
DE10113523A DE10113523C2 (de) | 2001-02-22 | 2001-03-20 | Verfahren und Vorrichtung zur Qualitätsprüfung von Leiterplatten |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2002067002A1 true WO2002067002A1 (de) | 2002-08-29 |
Family
ID=26008599
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DE2002/000610 WO2002067002A1 (de) | 2001-02-22 | 2002-02-20 | Verfahren und vorrichtung zur qualitätsprüfung von leiterplatten |
Country Status (8)
Country | Link |
---|---|
US (1) | US6881595B2 (de) |
EP (1) | EP1364222A1 (de) |
JP (1) | JP2004522967A (de) |
CN (1) | CN1498346A (de) |
BR (1) | BR0207772A (de) |
CA (1) | CA2439167A1 (de) |
DE (1) | DE10290637D2 (de) |
WO (1) | WO2002067002A1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1668690A2 (de) * | 2003-09-16 | 2006-06-14 | GITMAN, Jacob | Analysator für elektrische ultimativ-defekte zur erkennung aller defekte in pcb/mcm |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CA2461862A1 (en) * | 2004-03-25 | 2005-09-25 | Francois Desloges | System and method for detecting connector pin insertion in printed circuit board assemblies |
US7444260B2 (en) * | 2006-09-25 | 2008-10-28 | Raad Peter E | Thermography measurement system for conducting thermal characterization of integrated circuits |
CN101201371B (zh) * | 2006-12-15 | 2011-12-21 | 鸿富锦精密工业(深圳)有限公司 | 印刷电路检测装置和方法 |
US7701222B2 (en) * | 2007-10-19 | 2010-04-20 | International Business Machines Corporation | Method for validating printed circuit board materials for high speed applications |
TWI467166B (zh) * | 2011-09-21 | 2015-01-01 | Giga Byte Tech Co Ltd | 故障檢測方法及故障檢測裝置 |
US9327699B2 (en) | 2014-01-29 | 2016-05-03 | Continental Automotive Systems, Inc. | Method for reducing reverse vehicle stopping distance using brake pre-charge |
TWI633300B (zh) * | 2017-03-06 | 2018-08-21 | 興城科技股份有限公司 | 薄膜電晶體面板缺陷之檢測方法及其裝置 |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2450526A1 (de) * | 1973-10-30 | 1975-05-07 | Westinghouse Electric Corp | Verfahren zur pruefung eines koerpers vorgegebenen schaltungsaufbaus |
EP0373069A1 (de) * | 1988-12-06 | 1990-06-13 | Bull S.A. | Verfahren zur Kontrolle einer bestückten gedruckten Leiterplatte, insbesondere zur Kontrolle der Bauteile der Karte und Anordnung zur Durchführung dieses Verfahrens |
US5440566A (en) * | 1991-09-23 | 1995-08-08 | Southwest Research Institute | Fault detection and diagnosis for printed circuit boards |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5157255A (en) * | 1990-04-05 | 1992-10-20 | General Electric Company | Compact, thermally efficient focal plane array and testing and repair thereof |
US6107107A (en) * | 1998-03-31 | 2000-08-22 | Advanced Micro Devices, Inc. | Analyzing an electronic circuit formed upon a frontside surface of a semiconductor substrate by detecting radiation exiting a backside surface coated with an antireflective material |
US6236196B1 (en) * | 1999-06-03 | 2001-05-22 | International Business Machines Corporation | Thermal modulation system and method for locating a circuit defect such as a short or incipient open independent of a circuit geometry |
-
2002
- 2002-02-20 US US10/468,712 patent/US6881595B2/en not_active Expired - Fee Related
- 2002-02-20 CN CNA028069560A patent/CN1498346A/zh active Pending
- 2002-02-20 CA CA002439167A patent/CA2439167A1/en not_active Abandoned
- 2002-02-20 JP JP2002566675A patent/JP2004522967A/ja active Pending
- 2002-02-20 DE DE10290637T patent/DE10290637D2/de not_active Expired - Fee Related
- 2002-02-20 EP EP02714042A patent/EP1364222A1/de not_active Withdrawn
- 2002-02-20 BR BR0207772-8A patent/BR0207772A/pt not_active IP Right Cessation
- 2002-02-20 WO PCT/DE2002/000610 patent/WO2002067002A1/de not_active Application Discontinuation
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2450526A1 (de) * | 1973-10-30 | 1975-05-07 | Westinghouse Electric Corp | Verfahren zur pruefung eines koerpers vorgegebenen schaltungsaufbaus |
EP0373069A1 (de) * | 1988-12-06 | 1990-06-13 | Bull S.A. | Verfahren zur Kontrolle einer bestückten gedruckten Leiterplatte, insbesondere zur Kontrolle der Bauteile der Karte und Anordnung zur Durchführung dieses Verfahrens |
US5440566A (en) * | 1991-09-23 | 1995-08-08 | Southwest Research Institute | Fault detection and diagnosis for printed circuit boards |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1668690A2 (de) * | 2003-09-16 | 2006-06-14 | GITMAN, Jacob | Analysator für elektrische ultimativ-defekte zur erkennung aller defekte in pcb/mcm |
EP1668690A4 (de) * | 2003-09-16 | 2011-08-03 | Invisible Ltd | Analysator für elektrische ultimativ-defekte zur erkennung aller defekte in pcb/mcm |
Also Published As
Publication number | Publication date |
---|---|
US6881595B2 (en) | 2005-04-19 |
JP2004522967A (ja) | 2004-07-29 |
DE10290637D2 (de) | 2004-04-15 |
BR0207772A (pt) | 2004-09-08 |
CN1498346A (zh) | 2004-05-19 |
EP1364222A1 (de) | 2003-11-26 |
CA2439167A1 (en) | 2002-08-29 |
US20040164742A1 (en) | 2004-08-26 |
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