1. Dave Hurlburt dah@cadence.com March 27, 2018
Design True DFx
Dave Hurlburt
March 27, 2018

2. Agenda In-Design DFx, what is it?
Traditional manufacturing sign-off flow
In-Design DFx capabilities
Demo
Summary

3. In-Design DFx, what is it?

4. Allegro/OrCAD In-Design DFx
On-line Manufacturing Checks
Not an external tool as is the prevalent industry standard of batch-mode
Consistent with Allegro Constraint Driven on-line checking solution
Real-time violation detection
Benefits
Shortens the PCB design release process
Eliminates unnecessary iterations with a sign-off user
Predictable design process
Addresses critical DFF checks
~200+ basic checks in Allegro PCB Designer*
~1500+ advanced checks in Allegro Venture PCB Designer*
Integrated in Allegro Canvas
Significantly reduce dependence on Valor, enabling displacements
Integrated DRC description with graphics
* Based on a typical rules configuration

5. Traditional Manufacturing Sign-off Flow

6. Traditional Sign-off Flow
Step 1 : Edit design
- Electrical constraints build design intent
Logic
Schematics
Placement
Routing
Mfg Prep
Step 2 : Prepare design for sign-off
- Generate output files
- Gerber, NC drill, IPC-356….
- Create file package
- Send to validation tool
4 to 48 hours
Manufacturing
Sign-off
Step 3 : Run validation tools
- Verify all data present
- Errors found return to Step 1
Step 4 : Send to manufacturing
CM / EMS

7. Most Common Issues found at sign-off
Copper to board edge spacing
Acid traps
Copper slivers
Annular ring

8. What’s wrong with this process?
Most common issues are found late in the process
Communication delays for issue notification
Once corrected, verified again
Causes delays in release to manufacturing
Interruption of work in progress

9. In-Design DFx Capabilities

10. Design For Fabrication Checks Data
Physical fabrication based checks only
Bare board type checks.
No net checks
No constraint region checks
Rigid-Flex zone aware
Defined in Constraint Manager
Import/export only manufacturing rules capability
DRC Modes Analysis
Online, batch, off
Additional group of constraint set checks
Only targeted at fabrication and assembly
Independent of all other constraint driven rules
Leverages multi-threading technology to enhance performance

11. In-Design DFx Finds Common Issues
Copper to board edge spacing
Acid traps
Copper slivers
Annular ring

12. In-Design DFx in the PCB Editor 17.2
Currently available in 17.2 QIR4 update
Released August 2017

13. In-Design DFx Basic In-Design checking Five (5) major DFF categories
On-line checking when using interactive commands
Five (5) major DFF categories
Outline
Mask
Annular Ring
Copper Spacing
Silkscreen
DFF rule management
Import/Export support
Multiple configurations
Supports technology file rule locking

14. New In-Design DFx Advanced
Expanded Checks
More object types
Analytics (ex. hole aspect ratio)
Rigid/flex features (ex. arc corner)
Seven (7) major DFF categories
Outline
Mask
Annular Ring
Holes
Copper Features
Copper Spacing
Silkscreen

15. Typical DFF Rule Configuration Examples
Product
DFF Rule Classes
Root Rules
Rigid or Flex Configuration
Rigid/Flex Configuration
In-Design DFF Basic 5 80
210 checks
~350 checks
In-Design DFF Advanced 7
645
1742 checks
~2535 checks

16. List of every rule that DFF checks

17. Outline and Cutout checks

18. Annular Ring Checks

19. Hole and Silkscreen

20. Copper Features

21. Copper Spacing

22. Copper Spacing continued

23. Copper Spacing continued
Pictures?

24. Copper Spacing continued
These categories all expand to the same level of granularity as the trace/pin examples in the previous slides

25. Summary

26. Summary Real-time, integrated DFM solution
Differentiated solution, not batch oriented
Consistent with Allegro Constraint Driven design flow
Addresses critical DFF needs
Fewer Iterations between Design and Sign- off
Reduction in release to manufacturing time
Allegro
with in-design DFx MO
CM / EMS

27. What’s Next for In-Design DFx
DFF rule enhancements
Continue to add more rule sets
Additional DFx Domains
Design for Assembly
Design for Test