Please Delete the following if you are not interested in the Northern
Illinois Chapter IPC Designer's Council Meeting minutes for 4/30/96
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The Northern Illinois Designer's Council met on 4/30/96 for it's third
time. We had a large turnout with 33 people attending! The meeting
opened up with a welcome/introduction from Karl Bates.
Karl explained the the Designer's Council was important
1.) Provide a way to get accreditation for knowledge PCB
Designers have gained through experience.
2.) Give "clout" to PCB Designers Nation-wide in the
development of software and other standards (IPC Standards also)
3.) Network with other PCB Designers.
4.) Provide Educational meetings and forums to enhance PCB
Design knowledge like:
Technical seminars
film
On-site inspection and educatioal understanding of
Photoplotting facilities
PCB Fabrication plants
PCB Assembly plants
many others....
Our guest speakers were:
Ron Bonninger- President of DEH
Joseph Hennessey- Manufacturers Representative of Greenslade Sales
Jonathan Pu- IS/CAD Manager of DEH
The presentation was on THE VALUE OF RS-274-X AND IPC 356D
The following is straight from the slide show presented by our guest
speakers.
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"Building the Data Bridge"
Northern Illinois IPC Designer Council
Presented By:
DEH Printed Circuits, Inc...
April 30, 1996
What is DEH?
"Through total employee participation DEH serves its customers
as a world leading expert in the manufacturing know-how required
to deliver quick turn, complex printed circuit boards required
for the manufacturing of new and innovative technologies that
our customers develop to serve fast growing markets"
The DEH Business Focus
- Focus on the customer
- Focus on the continuing need to stay on the leading edge of
manufacturing technology
- Focus on quality and continuous improvement
- Focus on the complex quick-turn prototype business
- Focus on the continuing need to train and develop our employees
- Focus on fast growing markets
The DEH Management Team
- Ron Boninger - President
10 years of technology driven business mgmt.
- Wayne Price - GM of Operations
20 years quickturn pcb experience
- John Lewis - Production Manager
15 years pcb mgmt/5 years quality
- Chris Willems - Total Quality Mgr./ISO Mgmt. Rep.
5 years Motorola mfg and quality experience
- Maggie Brown - Director of Sales
10 years of quickturn IBM PCB purchasing and sales experience
- IS/CAD Manager - Jonathan Pu
Data General pcb fabrication experience and
Tectrol design experience
- David Lackey - Eng/Lam/Fab Mgr
former pcb business owner/15 years experience
- Efrain Aguinaga - Night Production Mgr.
13 years quickturn pcb experience
DEH Capabilities
- 2 mil lines, 5 mil holes
- Up to eight layers in 24 hours
- FR4, GTEK, Teflon, Flex, Rigid Flex, TMM,
Cyanate Ester, Polyimide and BT
- Cymbolic Sciences Fire 9X70 1/8 Mil Resolution Photo Plotter
- Orbotech PC-1490 for Automated Optical Inspection
- Probot Series 6-D Flying Probe Electrical Testing
- Non-destructive testing for process monitoring
- Vacuum assisted high temperature multi-layer lamination
- Gerber compare to IPC 356 or Neutral File (implementation phase)
- Inverted Metallurgical Microscope
- 24 hours a day, 6 days a week
- All production done in-house
- Redundant systems for all aspects of operation
The Bottom Line
"Meet and exceed Customer standards for quality, on-time
delivery and customer service for a quick turn, prototype
supplier of complex printed circuit boards"
Objective of Meeting
- "Build the Data Bridge" Between Design and Manufacturing
Transfer useful data in efficient formats
Use power of computer data analysis
- Generate Discussion and List of Implementation Issues
If simple it would have been done
Partnership from both sides makes sense because everyone will
benefit
Two Building Blocks For the "Data Bridge"
- RS-274-X (Imbedded Apertures)
Combines RS-274-D and Aperture List
- IPC-356-D (Neutral File)
Important supplement to net list extraction from Gerber
- These are not the only blocks for a better bridge
Opportunities for improvement exist with drilling, routing,
fabrication information, electrical testing and read-me content
Open communication will continue to enhance the
bridge building process
- A small investment in time by manufacturers, software vendors
and designers can result in enormous benefits
What is Wrong with RS-274D
Basically, old standard that does not take advantage of new technology
Pad names interpreted by someone else, not designer who knows best
Dcodes manually entered can create human error
Dcode software conversion programs subject to error
Version of conversion program issue
Handling of unique codes or changes
Time consuming manual entry
Time consuming because of all double checks to avoid error conditions
What is Right with RS-274-X
Apertures (Dcodes) imbedded with Gerber
Eliminates manual entry of Dcodes
Standardizes software interpretation of Dcodes
Dcode interpretation done by designer who knows correct output
Viewing of file is made simple ( do not need separate aperture table)
RS-274-X Implementation Issues
- Determine capability of your CAD software with vendor assistance
- Work with your PCB vendor to understand specific data needs of
your application
- Determine any composite images or custom aperture needs for
which macros are required
- Do trial data transfer run and confirm correctness of artwork
Imbedded Apertures Conclusion
ULTIMATELY SAVES TIME AND MONEY BY REDUCING TIME TO
MANUFACTURE AND ERROR PROBABILITY
All CAD/CAM vendors should be encouraged to support outputting
and accepting this format
Implementation should be done in partnership with your PCB manufacturer
Why is CAD (Design) Driven Net List so Important
A net list derived from the CAD data provides the information
the manufacturer needs to determine if the board is being
manufactured correctly
By definition CAD data is manipulated to become Gerber data
and then Gerber data is manipulated to become manufacturing data.
Having a Net List derived from original CAD design data provides
the manufacturer with a tool to verify errors have not occurred
during the data translation process
Electrical data not just artwork information is provided to manufacturer
NETS DERIVED FROM DESIGN DATA ARE EITHER IN A
NEUTRAL FILE OR IPC 356D FORMAT
Why is Gerber and Fabrication data not enough
Gerber was created as a means of communicating graphical
information to a plotter
Fabrication data required for manufacturing includes
information such as drill, layering and rout
Neither of these documents tells the manufacturer how the board
is suppose to operate electrically... What it is really suppose to do
Most Common package supplied today is Gerber and Fab data
MANUFACTURERS HAVE COMPENSATED FOR THIS BY DOING NET LIST
EXTRACTION
Net connectivity is deduced by tracing paths and using drill information
"NO NET LIST EXTRACTION IS AS GOOD AS USING THE ORIGINAL"
Printed Circuit Design / June 1995
At best it is a derivative of a derivative and does not catch
problems that may have occurred during the data translation process
What are IPC-D-350D and IPC-D-356?
- IPC-D-350D
IPC standard for the "exchange of PCB data at the design,
drafting, tooling, manufacturing and testing level".
Goal of standard is to find a "neutral level of data exchange"
Excellent job of representing how PCBs are manufactured
(defining artwork requirements)
Falls short on net list annotation - the "monk" got tired
Standard never caught on
- IPC-D-356
Finishes the work of IPC 350D
Focuses on defining a standard format for the data
required to do bare board electrical testing
- Comments
Standards are user community and vendor driven, created standards
are unusual...Most data transfer issues have been industry solved.
Primary benefit of using Standard is to create a net list
neutral file from original engineered design data
How is an IPC-356D File or Neutral File used?
Its usage is most valuable at the front end of the PCB
manufacturing process
Software (On-line in some cases!) is available to do
what is sometimes called Gerber Comparison
Gerber Comparison compares the extracted net to the
original net as defined by the IPC-356D or Neutral File
If errors occur during design translation or the manufacturing
process the Gerber Comparison process will identify them
BEFORE THE BOARDS ARE MANUFACTURED.
Additionally, as the board moves through the manufacturing process
it can also be checked against the CAD derived net at various
process points and finally at electrical test.
- AOI of artwork
- AOI of Inner Layers
- Electrical test
IPC 356D or Neutral File Implementation Issues
- Determine capability of your CAD software with vendor assistance
- Work with your PCB vendor to understand specific data needs
of your application and types of formats accepted
- If original schematic is modified during design process
back annotation is important
Conclusion
- Designers and manufacturers working together can flawlessly
go from concept/design to fabrication
- Standards are not a necessity - we can make it work now
by working together
- From these efforts a defacto standard may be created
- Northern Illinois Design Council Could be Driving force.
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Lisa Williams, of IPC, gave and overview of IPC. IPC began in Chicago
by 5 Board Manufacturers.
Lisa also went over the history of the Designer's Council. It began
in Atlanta in 1992. Nationally, different chapters are working on
various areas such as:
Test Patterns
Data Transfer Strategy
Certification
Salary Survey
Data Package Schematics
Writing a Book
Lisa went over her handouts which included:
Membership Application (Dues are $50) Please call Lisa if your looking to
become a member and don't have an application form 847.509.9700 x379
email [log in to unmask]
or mail your application form along with $50 and the chapter you want
to belong, send to:
IPC
2215 Sanders Road
Northbrook, IL 60062-6135
IPC Designers Council Chapter Activities
Certification-both study guide information and an explanation of what
it is.
Objectives by Certification Level
A List of Chairmen from other IPC Designer Councils
A Listing of Email Forums
IPC Model Designers Council Chapter bylaws
Minutes of IPC Designers Council Executive Board/Steering Committee Meeting
held 10/1/95 in Providence, RI
IPC TechWorks '96
Lisa also went over the Executive Board Council meeting held March
18th and 19th at the PCB Design Conference in Santa Clara, CA. The
board discussed:
1.) Restructuring the Designers Council to allow individuals to join on
(administrative headaches gone)
2.) Certification Program was modified to 2 Levels
There will be another National meeting of the IPC Designers Cuncil and its
Executive Board at DesignWorks, the design conference of the Designers
Council. DesigneWorks will be held in Naples, FL, October 21-25.
Charlene Dwyer, had everyone introduce themselves, their company, title
and software used. A survey was passed out, not many responded so if you
didn't, please copy the next section, fill out and email to
[log in to unmask]
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1.) Are you interested in becoming a member of the IPC Illinois
Designers Council?
a.)If interested, what do you expect to get out of the council?
b.)If not interested, we would like to hear your comments.
2.) Are you interested in the IPC Designers Certification program?
3.) Upon becoming a member, what would be the most convenient time for
meetings.
How often? (quarterly, monthly, ect.) Time of day (morning, afternoon,
evening)
Where? (IPC headquarters, Your business, roving)
4.) What council sponsored activities would interest you?
Technical seminars on Surface mount design, high speed design,
crosstalk, documentation, ect., field trips to photographers,
fabricators, assemblers, other.
5.) Would you be willing to become an officer in the council?
6.) Would you like to be on our mail, email, or fax list?
7.) Other suggestions or comments:
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Ken Lil talked about the upcoming meeting to be held June 21 at Excel and
AMS. Excel is a board house, and AMS is a photo imaging place.
Karl ended with encouragement to participate and to sign up on the
email forums.
Karl Bates - Northern Illinois Designer's Council President
Ken Lil - Northern Illinois Designer's Council Vice President
Charlene Dwyer - Northern Illinois Designer's Council Secretary/Treasurer
Lisa Williams - IPC representative
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