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14
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13
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14
45
20

Impedance Control PCB

Number of layers 4 –14 layers standard, 18 layers advanced
Technology highlights Multi-layer boards with a higher connection pad density than standard boards, with finer lines/spaces, smaller via Holes and capture pads allowing microchip to only penetrate select layers and also be placed in surface pads.
HDI builds 1+n+1, 2+N+2, 3+N+3
Materials FR-4 high performance, Halogen-free FR-4, Rogers 4350B
Copper weights (finished) 18um – 70um
PCB thickness 0.40 mm – 3.20 mm
Maximum dimensions 600 mm x 450 mm; dependent upon laser drilling machine
Surface finishes available OSP, ENIG, EESPIG, HAL, LFH ASL Immersion Tin, Immersion Silver, Electroplate gold, Gold Fingers
Minimum mechanical drill 0.15 mm
Minimum laser drill 0.10 mm standard, 0.075 mm advanced
size 10-20
  • Tg is a mechanical property that designates glass transition temperature, that is, the highest temperature at which the substrate remains rigid.
  • the base material (polymer or glass) is shifting from a glassy, solid, rigid state to rubbery state when the temperature goes up to a certain area, so the temperature just at this moment is called the glass transition temperature (Tg)
  • Normal FR4 PCB tg is 130-140 degrees, the medium tg is greater than 150-160 degrees, high tg is greater than 170 degrees.
  • High tg 170 degrees have a better mechanical and chemical resistance to heat and moisture than standard FR4.

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Description

Tg is a mechanical property that designates glass transition temperature, that is, the highest temperature at which the substrate remains rigid.

the base material (polymer or glass) is shifting from a glassy, solid, rigid state to rubbery state when the temperature goes up to a certain area, so the temperature just at this moment is called the glass transition temperature (Tg)

 

Normal FR4 PCB tg is 130-140 degrees, the medium tg is greater than 150-160 degrees, high tg is greater than 170 degrees.  

High tg 170 degrees have a better mechanical and chemical resistance to heat and moisture than standard FR4.

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