PCB design requirements
Etched boards
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Design Rules > Routing |
Protel 99 Path = Design > Rules > Routing |
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> Clearance Constraint |
= 10mil : All Objects |
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> Routing Via Style |
= 50mil dia / 20mil hole : Preferred Size = 50mil dia / 20mil hole : Minimum Size |
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> Width Constraint |
= minimum 10mil = preferred 12mil = maximum user defined |
NB: Wider tracks are mechanically superior. Choose carefully! |
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Design Rules > Manufacturing |
Protel 99 Path = Design > Rules > Manufacturing |
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> Hole Size Constraint |
= minimum 20mil : Define hole sizes in 4mil increments = maximum user defined : starting at 20mil (0.5mm) |
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> Minimum Annular Ring |
= minimum 10mil EXTREMELY IMPORTANT! |
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> Polygon Connect Style |
= Rule Attributes = Conductor Width = Conductors = Angle = Filter Kind = Pwr Plane Clearance |
Relief Connect 15mil 4 90 Angle Whole Board 20mil |
: Nominal : Nominal : Nominal : Nominal : Nominal : Nominal |
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Design Options > Options |
Protel 99 Path = Design > Options > Options |
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> Grids |
= Snap X = Snap Y = Component X = Component Y |
25mil 25mil 25mil 25mil |
: Nominal : Nominal : Nominal : Nominal |
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> Measurement Unit |
= Imperial |
Inches |
: Preferred |
Position in Workspace
Place the PCB design such that the lower left corner of the PCB is at workspace coordinate 1000mil, 1000mil.
Borders
- Ensure borders are created on ALL electrical layers using 10mil tracks. We require these borders to assist in artwork alignment (Tip - try using multilayer for borders).
- It is recommended that there is a minimum clearance of 120mil (3mm) between the edge of the board and all PCB elements.
Mounting Requirements
- Do you need mounting holes
- For M3 mounting holes use PCB library component SPACER01 in KBpcb05 library
Final Checks
Ensure you check your schematic running ERC, and PCB by running DRC
Manufacturing Options
- We do not produce etched PCB's with plated through holes. You must therefore ensure all pads and vias that require soldering are accessible and not obstructed in any way.
- If you do require plated through holes we can manufacture your PCB in the Electronics Engineering Laboratory using alternative technology.
Libraries
It is important to note that a large number of PCB footprints intended for through hole components supplied by Protel are incompatible with our manufacturing process.
It is therefore recommended that you use the Electronics Engineering Laboratory Libraries which support many of the components held by this facility and are fully compatible with our PCB manufacturing process.
Schematic and PCB libraries are available for download from the Engineering & Technical Support Group website.
If you have already designed your PCB using (TH) footprints supplied by Protel, it is suggested that you carry out a thorough inspection with respect to physical size, annular ring and hole size requirements for each component before submitting your design for manufacture.
Library Catalogue Access
The Protel Library Catalogue displays the contents of our Schematic and PCB Libraries and is accessible at the following locations:
- Electronics Engineering Lab student computing area > Non-removable hard copy
- Engineering & Technical Support Group website > PDF files for download
Feedback
Please email any suggestions to the Engineering & Technical Support Group Manager
Milled boards
PCB Dimensions
Absolute maximum PCB dimensions = 230mm x 150mm (9.05 inches x 5.90 inches)
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Design Rules > Routing |
Protel 99 Path = Design > Rules > Routing |
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> Clearance Constraint |
= Polygons, pads, vias & general clearances must be configured |
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Name Optional
Optional
Optional |
Scope 1 Polygon
Pads, Vias
Board |
Scope 2 Board
Board
Board |
Connectivity Different Nets
Different Nets
Different Nets |
Clearance 15mil 10mil 12mil 08mil 05mil |
Remarks Preferred Absolute Minimum Preferred Absolute Minimum Absolute Minimum |
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> Routing Via Style |
= 50mil dia / 20mil hole = 30mil dia / 12mil hole |
: Preferred Size : Absolute Minimum |
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> Width Constraint |
= 06mil to 10mil = 04mil = xxmil |
: Preferred Minimum Size : Absolute Minimum : User Defined Maximum |
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Design Rules > Manufacturing |
Protel 99 Path = Design > Rules > Manufacturing |
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> Hole Size Constraint |
= 12mil (0.3mm) = xxmil |
: Absolute Minimum : User Defined Maximum |
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> Hole Size Increments |
= 4mil (0.1mm) |
: Workshop Requirement |
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> Polygon Connect Style |
= Rule Attributes = Conductor Width = Conductors = Angle = Filter Kind = Pwr Plane Clearance |
= Relief Connect = 10mil = 4 = 90 Angle = Whole Board = 15mil |
: Nominal : Nominal : Nominal : Nominal : Nominal : Nominal |
Position in Workspace
Place the PCB design such that the lower left corner of the PCB is at workspace coordinate 1000mil, 1000mil.
Borders
- Ensure borders are created on ALL electrical layers using 10mil tracks. We require these borders to assist in artwork alignment (Tip - try using Multilayer for borders).
- It is recommended that there is a minimum clearance of 120mil (3mm) between the edge of the board and all PCB elements.
Mounting Requirements
- Do you need mounting holes
- For M3 mounting holes use PCB library component SPACER01 in KBpcb05 library
Final Checks
Ensure you check your schematic running ERC, and PCB by running DRC
Libraries
It is important to note that a large number of PCB footprints intended for through hole components supplied by Protel/Altium are incompatible with our manufacturing process.
It is therefore recommended that you use the Electronics Engineering Laboratory Libraries which support many of the components held by this facility and are fully compatible with our PCB manufacturing process.
Schematic and PCB libraries are available for download from the Engineering & Technical Support Group website.
If you have already designed your PCB using (TH) footprints supplied by Protel/Altium, it is suggested that you carry out a thorough inspection with respect to physical size, annular ring and hole size requirements for each component before submitting your design for manufacture.
Library Catalogue Access
The Protel/Altium Library Catalogue displays the contents of our Schematic and PCB Libraries and is accessible at the following locations:
- Electronics Engineering Lab student computing area > Non-removable hard copy
- Engineering & Technical Support Group website > PDF/ZIP files for download
Feedback
Please email any suggestions to the Engineering & Technical Support Group Manager
External Manufacture (BEC)
|
Design Rules > Routing |
Protel 99 Path = Design > Rules > Routing |
|
|
> Clearance Constraint |
= 10mil : Preferred (All Objects) |
|
|
> Routing Via Style |
= 50mil dia / 20mil hole : Preferred Size = 30mil dia / 20mil hole : Minimum Size |
|
|
> Width Constraint |
= minimum 10mil = preferred 12mil = maximum user defined |
NB: Wider tracks are mechanically superior. Choose carefully! |
|
Design Rules > Manufacturing |
Protel 99 Path = Design > Rules > Manufacturing |
||
|
> Hole Size Constraint |
= minimum 12mil : Define hole sizes in 4mil increments = maximum user defined : starting at 12mil (0.3mm) |
||
|
> Minimum Annular Ring |
= minimum 10mil EXTREMELY IMPORTANT! |
||
|
> Polygon Connect Style |
= Rule Attributes = Conductor Width = Conductors = Angle = Filter Kind = Pwr Plane Clearance |
Relief Connect 15mil 4 90 Angle Whole Board 20mil |
: Nominal : Nominal : Nominal : Nominal : Nominal : Nominal |
|
Design Options > Options |
Protel 99 Path = Design > Options > Options |
||
|
> Grids |
= Snap X = Snap Y = Component X = Component Y |
25mil 25mil 25mil 25mil |
: Nominal : Nominal : Nominal : Nominal |
|
> Measurement Unit |
= Imperial |
Inches |
: Preferred |
Position in Workspace
Place the PCB design such that the lower left corner of the PCB is at workspace coordinate 1000mil, 1000mil.
Borders
- Ensure the PCB border is created on Mechanical Layer 1 using 10mil tracks
- It is recommended that there is a minimum clearance of 120mil (3mm) between the border and all PCB elements
Identification
All printed circuit boards shall be idented on an appropriate layer (Nominally, Top Overlay). Please note: boards presented for manufacture wihout a suitable ident will be rejected.
Mounting Requirements
- Do you need mounting holes
- For M3 mounting holes use PCB library component SPACER01 in KBpcb05 library
Final Checks
- Ensure you check your schematic running ERC, and PCB by running DRC
- Further information regarding PCB design requirements may be found at www.becman.com
Libraries
It is important to note that a large number of PCB footprints intended for through hole components supplied by Protel are incompatible with our manufacturing process.
It is therefore recommended that you use the Electronics Engineering Laboratory Libraries which support many of the components held by this facility and are fully compatible with our PCB manufacturing process.
Schematic and PCB libraries are available for download from the Engineering & Technical Support Group website.
If you have already designed your PCB using (TH) footprints supplied by Protel, it is suggested that you carry out a thorough inspection with respect to physical size, annular ring and hole size requirements for each component before submitting your design for manufacture.
Library Catalogue Access
The Protel Library Catalogue displays the contents of our Schematic and PCB Libraries and is accessible at the following locations:
- Electronics Engineering Lab student computing area > Non-removable hard copy
- Engineering & Technical Support Group website > PDF files for download
Feedback
Please email any suggestions to the Engineering & Technical Support Group Manager