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files to be turned in to pcb manufacturer

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circuit

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I intend to submit files to advanced circuits for manufacturing my pcb. their site had this as file guidelines

Gerber formats should be in ODB++, 274x, or 274d.
Gerber File should use English units (one gerber file per layer). We prefer 2.3 leading format.
Please use a max of 8-character names before extension of 3 characters.
Please include fabrication print showing printed circuit board outline with drill pattern and sizes in gerber format.
An aperture file needs to be included (some layout packages need 1 for each layer).
A CNC Drill File in Excellon format needs to also be included. We prefer 2.4 trailing format


My software(Ultiboard) exports all the individual layers, Silkscreen and Soldermask top and bottom, Board outline, Drill as gerber files....NC Drill file(as .drl) and i uploaded all these in their site where they do a free DFM and gave me no errors. what is the aperture file ? Thanks !
 

Aperture File- Basic Gerber (RS274D) is not complete without an Aperture File. The aperture file is a list that defines the characteristics of each D-code contained in the gerber files. Each PCB Design tool will output aperture files with slightly different formatting. Below are examples of two different types of aperture files:

Example 1:


# Units: Inches
#
# Shape Width Height Type Tool Tool Size Legend R90
#
D10 Round 0.007000 0.007000 ThruHole 0 0.0 D0 0
D11 Round 0.005000 0.005000 ThruHole 0 0.0 D0 0
D12 Round 0.012000 0.012000 ThruHole 0 0.0 D0 0
D13 Round 0.015000 0.015000 ThruHole 0 0.0 D0 0

Example 2:
Position Width Hgt/ID Shape Qty
======== ===== ====== ===== ===
10 125 0 RND 27
11 50 0 RND 4238
13 60 0 RND 458
14 50 0 SQR 1


NOTE: Aperture Files are not required for 274X or Fire9000 format Gerber files as they are embedded in the Gerber file.
Regards,
IanP
 

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