Advanced Metallization & Interconnect Systems for Ulsi by Robert Havemann, John Schmitz, Hiroshi Komiyama, Kazuo PDF

By Robert Havemann, John Schmitz, Hiroshi Komiyama, Kazuo Tsubouchi

ISBN-10: 1558993851

ISBN-13: 9781558993853

The MRS Symposium continuing sequence is an the world over regarded reference compatible for researchers and practitioners.

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Additional resources for Advanced Metallization & Interconnect Systems for Ulsi Applications in 1996: Materials Research Society Conference Proceedings

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These basic joint preparation shapes are suitable for most purposes although modification may be necessary depending on the position and accessi­ bility of the joint. 31 32 Welded Joint Design Weld Detail Thickness mm T G mm a (3 R L r mm mm mm 3-6 3 _ _ _ _ _ Flat 3-5 3 _ _ _ _ _ Horizontalvertical or vertical 3-5 5-8 8-16 6 8 10 — i i T _ _ — — — _ _ _ _ _ _ — _ _ 60° 60° 5-12 Over 12 3 m m max. Position Over 10 6 10 Over 12 3 Over 12 3 Over 20 — Welded from both sides All Welded from one side with steel backing strip All Welded from both sides or one side only 0 0 +2 -0 All 60° 60° 2 All 45° 20° Notes 2 m m max.

The U preparation requires a machining operation whereas the bevel can be gas cut - a cheaper and quicker technique. The T-joint made w i t h a butt weld requires preparation, and the same considerations arise but are compounded in some cases by access consider­ ations. Although a stick electrode can be used satisfactorily in a J preparation, the size of the nozzle of a M I G / M A G gun may prevent adequate root access and give rise to defects in the root and possibly at the side wall. The single V will probably be better for the M I G / MAG gun.

For example a fatigue crack w h i c h goes through the wall of a tank, pipeline, or pressure vessel will cause leakage even though there is no structural collapse. A crack can change the stiffness of a structure and make it liable to resonate at loading frequencies it was designed to avoid. The last t w o effects are, in fact, turned to advantage in some areas. The presence of cracks in helicopter rotor blades and the tubular jibs of very large draglines is detected by pressurising the hollow members and measuring pressure drops which occur if fatigue cracks are present.

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Advanced Metallization & Interconnect Systems for Ulsi Applications in 1996: Materials Research Society Conference Proceedings by Robert Havemann, John Schmitz, Hiroshi Komiyama, Kazuo Tsubouchi


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