公开(公告)号：US3917148A

公开(公告)日：1975-11-04

申请号：US40804473

申请日：1973-10-19

Applicant: TECHNICAL DEVICES INC

Inventor： RUNYON ROBERT C

IPC: B23K20/00 ,  H01L21/00 ,  B23K3/02

CPC classification number: H01L24/85 ,  B23K20/005 ,  B23K2201/36 ,  H01L24/45 ,  H01L24/78 ,  H01L2224/45015 ,  H01L2224/45124 ,  H01L2224/45139 ,  H01L2224/45144 ,  H01L2224/45147 ,  H01L2224/78302 ,  H01L2224/78303 ,  H01L2224/85 ,  H01L2924/00014 ,  H01L2924/01005 ,  H01L2924/01006 ,  H01L2924/01013 ,  H01L2924/01029 ,  H01L2924/01033 ,  H01L2924/01041 ,  H01L2924/01042 ,  H01L2924/01047 ,  H01L2924/01073 ,  H01L2924/01074 ,  H01L2924/01075 ,  H01L2924/01078 ,  H01L2924/01079 ,  H01L2924/01082 ,  H01L2924/12041 ,  H01L2924/14 ,  H01L2224/48 ,  H01L2924/00 ,  H01L2924/20751 ,  H01L2924/20752 ,  H01L2924/00015

Abstract: A weld tip for use is capillary bonding welding for electronic components includes a structural body member having a conically tapered end which forms the welding tip. A bore is provided in axial alignment with the center axis of the body member, the portion of the bore in the region of the tip forming the welding end being frusto-conical in shape, i.e., tapered with respect to the central axis, while the other end of the bonding tip includes a generally cylindrical bore. Positioned between the cylindrical bore and the tapered bore at the tip end is a second tapered bore, the latter being tapered to a greater degree than the bore at the tip end of the tool. The tip is formed by a chemical vapor deposition procedure utilizing an improved mandrel of a predetermined configuration such that preselected openings may be provided in the free end of the welding tip by cutting at preselected points along the axis of the mandrel. Thus, one mandrel may be used to provide welding tips having apertures in the working end thereof of different diameters. Typical materials which may be used as the structural material are tungsten, rhenium, molybdenum, and alloys thereof, tantalum carbide and columbium carbide, the preferred material being an alloy of tungsten and carbon wherein the carbon is present in an amount of between 0.40% and 0.50% by weight.

Abstract translation: 使用的焊接头是电子部件的毛细管接合焊接，包括具有形成焊接尖端的锥形端部的结构体部件。 孔被提供为与主体构件的中心轴线轴向对准，在形成焊接端的尖端区域中的孔的部分是截头圆锥形的，即相对于中心轴线呈锥形，而 接合末端的另一端包括大致圆柱形的孔。 位于圆柱形孔和尖端处的锥形孔之间的是第二锥形孔，后者与第一锥形孔相比锥度大于工具尖端处的孔。 尖端通过使用预定构造的改进的心轴的化学气相沉积程序形成，使得可以在沿着心轴的轴线的预选点处切割焊接尖端的自由端中的预选开口。 因此，可以使用一个心轴来提供在其工作端具有不同直径的孔的焊接尖端。 可用作结构材料的典型材料是钨，铼，钼及其合金，碳化钽和碳化铌，优选的材料是钨和碳的合金，其中碳的存在量为0.40％至 0.50重量％。