The information presented is clear and easily understandable, the chances of getting the product you want on the first pass is greatly enhanced. On a minimal basis, we need to be given the following information in order to properly complete your order:    

• Class of product.
• Materials to be used for construction. 
      ·Base material and cover layer type. 
      ·Metal foil type and thickness.
  
• Hole count for each hole size called out.
• Data to define hole locations (hard/digital copy).
• Conductor layer count.
• Circuit artwork defining signal runs for each layer.
• Cross-sectional view of circuit construction.
• Cover layer or overcoat opening locations.
• Circuit outline with dimensions and datum’s.
• Marking requirements, materials and locations.
• Bend and files locations and direction of bend.
• Stiffener location and bonding requirements.
• Special processes and/or finish requirements.
• Tolerances for manufacturing. 
   　·Hole tolerances 
      ·Dimensional tolerances.
  
• Test point locations.
• Special electrical testing requirements 
    

Gerber Files Requirements: 
 

• An outline of the board, with a trace that is 2 - 10 mil (0.002" - 0.01") thick
• Separate Gerber file for each different layer.
• A tool listing with sizes (report file)
• The drill files should NOT be offset or mirrored 

   
  
A Readme file should include: 

• Company Information
• List of the Files (with descriptions) included in the zip file
• A listing of specifications for the board and a description of any special requirement
• Board Name or Part Number
• Quantity, Lead-time, Solder mask color, Silkscreen color, material thickness and finish