Online Catalog

FSW Heat Sink

FSW Heat Sink
  • Heat sinks will be joined together using Friction Stir Welding (FSW).
  • Maximum final size for a FSW heat sink is 400x190 (mm).
  • Standard lead time is 1-2weeks. No MOQ.
  • Additional modifications including holes, notches, and pedestals are possible.

If a FSW heat sink larger than the maximum size or using a different fin pattern is required, please contact our sales.

FSW jointed heat sink1 FSW jointed heat sink1
FSW jointed heat sinks
Production Method - Friction Stir Welding (FSW)

Friction Stir Welding is a method of joining materials by heating the surrounding material to a high temperature through friction with a rotating tool. This causes the material to soften and flow, joining the materials. Compared to other joining methods, it has the advantage of high energy efficiency and a stable joint quality.
At right is a photo of a cross-section, cut perpendicular to the weld line/joint. There are no visible voids or cavities.

fsw cut section

FSW heat sinks will have a conical hole remaining along the edge (right photo). This feature is a FSW process requirement and should not be significant thermally or mechanically.

fsw tool mark
Performance Impact of Joint

The following are results of a performance test, comparing a standard 100x100x30mm heat sink (UB100-30B) with a heat sink created by joining two smaller units by FSW to the same size. Thermal performance is virtually identical.

fsw comparison test work
Sample name m/sec 0.5 0.8 1 1.2 1.5 2 2.5 3 4
UB100-30B (℃/W) 0.586 0.430 0.373 0.340 0.306 0.275 0.257 0.245 0.227
UB100-30 FSW JOINT 0.588 0.431 0.375 0.342 0.308 0.276 0.258 0.246 0.228
Standard Size
heat sink image
  • We accept orders by email/fax.
  • The unit price is as follows for all heights and surface treatment within the series:
Suggested size (Please check each catalog page for the suggested size.)
Quantity 1 3 5 10 30 50 100
2x Joint US$215.14 US$94.46 US$69.36 US$47.91 US$33.60 US$30.74 US$28.60
4x Joint US$238.76 US$119.97 US$95.81 US$74.36 US$60.66 US$57.20 US$55.05
Other optional size
Quantity 1 3 5 10 30 50 100
2x Joint US$249.75 US$106.40 US$76.46 US$54.04 US$39.07 US$36.09 US$30.52
4x Joint US$280.83 US$137.47 US$107.53 US$85.11 US$70.14 US$67.16 US$58.49
Heat Sink Joint Pattern
 
W ≤ 100
 100 < W < Wmax
L ≤ 100  
FSW imgFSW img
100 < L ≤ Lmax
FSW imgFSW img
FSW imgFSW img
FSW imgFSW img

For details, please check each FSW heat sink series page.

FSW Series Name Base Heat Sink Lmax Wmax H
JLP2B LPD100 179.4 191.9 12 - 40
JLP4R LPD70130 240.6 132.3 12 - 40
JLPB6 LPD13070 119.8 253.3 12 - 40
JMD1N MD100 179.4 193.0 12 - 40
JUL0A ULP100 179.2 193.8 12 - 25
JL-02 L100 177.3 192.6 12 - 40
JLT0P LT70130 235.2 133.7 12 - 40
JLT0H LT13070 116.5 255.0 12 - 40
JUB1P UB100 177.3 195.2 12 - 25
JUB2Z UB13070 116.3 256.6 12 - 25
JN-02 N100 188.8 188.8 12 - 40
JN-14 N13070 129.3 249.4 12 - 40
JS-18 S20100 187.3 191.2 12 - 40

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