Design Rules > Routing |
Protel 99 Path = Design > Rules > Routing |
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> Clearance Constraint |
= 10mil : Preferred (All Objects) |
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> Routing Via Style |
= 50mil dia / 20mil hole : Preferred Size = 30mil 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! |
Design Rules > Manufacturing |
Protel 99 Path = Design > Rules > Manufacturing |
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> Hole Size Constraint |
= minimum 12mil : Define hole sizes in 4mil increments = maximum user defined : starting at 12mil (0.3mm) |
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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 |
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 |
> Measurement Unit |
= Imperial |
Inches |
: Preferred |
Place the PCB design such that the lower left corner of the PCB is at workspace coordinate 1000mil, 1000mil.
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.
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.
The Protel Library Catalogue displays the contents of our Schematic and PCB Libraries and is accessible at the following locations:
Please email any suggestions to the Engineering & Technical Support Group Manager