Schematics

We use Altium Schematic file(*.sch,schdoc), but pdf is also accepted

PCB file

We use Altium pcb file(*.pcb,pcbdoc), but pdf is also accepted

Gerber Format

THe Gerber format is an open 2D binary vector image file format.
It is the de facto standard used by printed circuit board (PCB) industry software to describe the printed circuit board images: copper layers, solder mask, legend, etc.
The standard file extension is .GBR or .gbr[1] though other extensions are also used.
There are two major generations of Gerber format:
Extended Gerber, or RS-274X. This is the current Gerber format. Standard Gerber, or RS-274-D. This obsolete format is deprecated. It is superseded by Extended Gerber.

Other Gerber format

ODB++-- a CAM format from Mentor Graphics.

DXF -- Used as drawing, PCB objects (tracks and pads) are lost, which makes them very difficult to use in CAM.

Drill File

The Excellon format is widely used to drive CNC drilling and routing machines in printed circuit board (PCB) manufacturing. It is a variant of the EIA RS-274-C standard. Example:
M48
;Layer_Color=9474304
;FILE_FORMAT=2:4
INCH,LZ
;TYPE=PLATED
T1F00S00C0.0280
T2F00S00C0.0320
T3F00S00C0.0340
%
T01
X06385Y-0036
X05455Y-00385
X0546Y-00205
T02
X060203Y006297
Y008297
T03
X0561Y-0012
Y-0022
X0468Y-0045
A typical Drill file need the following: Drill diameter or Drill data(bold) and Drill location(non bold).

DTE Electronics Pte Ltd