Single- and double-sided PCBs

 
 
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更新 2012-10-05 16:53
 
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WURTH ELECTRONICS SINGAPORE PTE. LTD.

第13年
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  • Asia-Singapore
  • 上次登录 2012-10-18
  • Sebastian Tan (先生)   Manager
详细说明
 

Single- and double-sided PCBs

Your direct benefit: Manufacture according to standard parameters

Some of our standards
Properties Values
max. circuit board size 570 x 500 mm
circuit board thickness max. 2.4 mm*
min. 0.6 mm
copper cladding (base copper) 18 µm, 35 µm, 70 µm, 105 µm
material FR4 (TG 135, TG 150, TG 170)
surface finishes HAL,   HAL lead-free, electroless nickel/ immersion gold,
immersion tin,   immersion silver  
min. tool diameter 0.25 mm
min. conductor track width and distance 100/100 µm
aspect ratio (hole diameter : circuit board thickness) 1 : 8
additional printing
  • legend printing 
  • via fill print 
  • peelable resist 
  * greater thickness upon request
Standardised documentation
Documentation Standard
Inspection certificate According to DIN EN 10204
Factory inspection certificate
  • According to DIN EN 10204 
  • Inspection according to IPC-A-6011 
Initial sample inspection “standard”
  • According to DIN EN 10204
  • Inspection according to IPC-A-6011
Initial sample inspection “thorough”
  • According to DIN EN 10204
  • Inspection according to IPC-A-6011
Overview of surfaces
  Lead-free Layer thickness Shelf life Comments
Hot Air Leveling (HAL) No (HAL SnPb) 1... 40 μm 12 months
  • no longer permissible since 2006 (exception: see guidelines) 
Hot Air Leveling (HAL) Yes 1... 40 μm 12 months
  • high process temperature (265-280 °C)
  • increased Cu removal, dependent on layout
Chemical nickel-gold cNiAu Yes 4 ... 7 μm Ni
0,075…±0,025 μm Au
12 months
  • low process-temperature (approx. 90 °C)
  • smooth coating
  • connection made to Ni
Chemical tin cSn Yes 0,8 ... 1,1 μm 6 months
  • low process temperature (approx. 70 °C)
  • smooth coating
  • growth in the intermetallic phase between Cu and Sn
  • layer thickness > 1 μm required for multiple soldering
  • rapid processing in the assembly process
Chemical silver cAg Yes 0,25 ... 0,35 μm 12 months
  • low process temperature (approx. 50 °C)
  • smooth coating
  • very good solder-ability / hole filling
  • compatible with all lead-free solders
  • rapid processing in the assembly process

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