Technologie

 

Base Material

• FR4, TECHNOLAM
• Tg = 140
• Material thickness: 0,5 mm; 0,8 mm; 1,0 mm; 1,2 mm; 1,55 mm, 2,0 mm
          / Extra charge for material 2.0 mm /
• Finish copper thickness 35, 55; 90um
          / Extra charge for the copper coating 90 microns /

Electrical layers

    • Minimum Bus:
            - Standard width - 0,254 mm (10 mils)
    • Minimum width - 0,150 mm (6 mils) - / extra cost /
    • Minimum distance between the rails:
            - Standard length - 0,254 mm (10 mils)
            - Minimum distance - 0,150 mm (6 mils) - / extra cost /
    • Pad size
            - Minimum pad size 0,75 mm / 0,35 mm with dril
            - Pad size ≥ 0,4 mm + drill size
    • minimum clearances to the board:
            - 0.254 mm / 10 mils - routing
            - 0,508 mm / 20 mils - V-Cut

Drilling

    • Tool type: Kemmer praezision
    • Minimum drill size: 0,35 mm / Pad ≥ 0,75 mm
            - / Extra charge for size below 0.5 mm /
    • Dimensions of drills: from 0,35 mm to 6,3 mm; increment 0,05 mm

Protective coatings

Solder Mask
It aims to protect the board during soldering. All tracks, polygons and other areas that will not be soldered is covered. It also increases protection against short circuits and pollution.
Application by Screen Printing
Shaping by fotoimage

Screen print:
This is service print, seeks to bring additional information to the board as: Labelling elements value elements, designate areas with dangerous voltage, etc..
Application by Screen Printing
Shaping by fotoobraz
Min line 5um (2 mils)

Silicone Mask:

Serves to protect the areas in direct contact with the solder wave. It provides perfect protection zones that not have to be soldered by solder.
Application by screen-printing with an image or Stencil
Torn off manually after passing the solder wave.

Final coating

ENIG - chemical nickel-coated Gold

    • unleaded coverage
    • perfect soldering
    • absolutely equal coverage best suited for BGA and other buildings with very high demands on surface for soldering
    • very high resistance to oxidation

Sn_Pb - Lead-Tin Coating

    • this is an electro-chemical tin-lead, which melts through the infra red lamps and forms a very tight finish.
    • presence of Tin-Lead on both sites, brazing and on slopes (in mask)
    • perfect soldering
    • suitable for coating plates with standard conventional assembly.
    • very high resistance to oxidation

Mechanical job

Cutting
It is done by CNC machine.
Blade width - 2.00 mm

Milling
Perform drilling and milling machines LENZ, SCHMOLL
Type of cutters Kemmer praezision
Size of Cutters: 0,7 mm; 0,8 mm; 1,0 mm; 1,2 mm; 1,5 mm; 1,6 mm; 2,0 mm; 2,4 mm
Standard cutter size: 2,00 mm

V-cut
V-cut represents operation in which the board is cut through to the relevant depth. Done by automatic CNC machine TELMEC.
Angle the blade: 30 °
Minimum distance between knives - 0.25 mm

Electrical Test

Electrical test is performed by an automatic "flying probe" Tester ATG - Luther & Maelzer GmbH

Parameters of electrical test:
    • Test for short circuits between all
    • Test interruption between all points in a chain
    • Maximum panel size: 600h600mm
    • Test voltage: 500V max
    • Number of test points: unlimited
    • Minimum distance between 2 points test: 50um (2 mils)