Comments for Roger ---BEGIN

I could not get rid of some layers in this board 
(called "notused1 and notused2).  Please double check database 
to ensure these layers are NOT used.


Comments for Roger ---END

 
Special instructions for DS26521:
1.	Silk screen top and bottom white with supplied artwork.
2.	Copper external / internal 0.5 ounce. External plated to 1 ounce.
3.	Hole sizes are finished size.  Tolerance is +/-0.003" except via (.010 hole) tolerance is +0.003" - via size, and .018 hole tolerance is +/- .002". 
4.	Finish: LPI Soldermask, color BLUE, with exposed copper areas plated with standard 3-8 micro inches immersion gold over 100 minimum micro inches electroless nickel.
5.	Material FR4, dielectric constant 4.5.
6.  Build / Manufacture to best commercial standards.
7.	Required stackup shown at end of this file
8.	NA
9.  Clip silkscreen if needed, based on soldermask (not pad-etch).




Enclosed files:
1)  Top.art     Layer 1  positive image artwork.
2)  L2_GND.art  Layer 2 positive image ground plane 
3)  L3.art      Layer 3 positive image artwork 
4)  L4.art      Layer 4 positive image artwork 
5)  L5_VCC.art      Layer 5 positive image ground plane
6)  Bottom.art  Layer 6 positive image artwork 
7)  silk_T.art	Top layer silk screen.
8)  silk_B.art	Bottom layer silk screen.
9)  sdr_m_t.art Top layer Soldermask.
10) sdr_m_b.art Bottom layer Soldermask.
11) Drill.art	Drill chart and board dimension.
12) ncdrill1.tap	
13) ncdrill.log
14) nc_param.txt
15) dimension.art	Outline / Dimension 


	
----------------------Stackup------------------------------------
********Total Board thickness must be 80 Mil +- 10 mil ********
Etch - L1 Top (Signal)	
  	      ****************Separation	13 +/-3 Mil (13 ideal)
Etch - L2 (Plane)	
          ****************Separation    20 +/-6 Mil
Etch - L3 (Signal)
          ****************Separation    20+/-10 Mil
Etch - L4 (Signal)
          ****************Separation    20 +/-6 Mil 
Etch - L5 (Plane)  
          ****************Separation    13 +/-3 Mil (13 ideal)  
Etch - L6 Bot (Signal)