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    • 31. 发明授权
    • Solder preform wrappable around a printed circuit card edge
    • 焊接预制件围绕印刷电路卡边缘封装
    • US5600102A
    • 1997-02-04
    • US607795
    • 1996-02-27
    • Paul A. Socha
    • Paul A. Socha
    • H01R43/02H05K1/11H05K3/34H05K1/02
    • H01R12/721H01R43/0235H05K3/3405H01R12/57H05K2201/10189H05K2201/10424H05K2203/0415H05K3/3478Y10T29/49149Y10T29/49151
    • An integral solder preform is disclosed for application to a printed circuit card having first and second sides, a first edge and first and second pluralities of conductive pads disposed on the respective first and second sides of the printed circuit card in respective first and second predetermined conductive pad arrangements. The integral solder preform has first and second pluralites of solder pads having respective first and second solder pad arrangements which are maintained in position by a plurality of bridging solder bands. The first and second solder pad arrangements correspond to the first and second predetermined conductive pad arrangements and are spaced apart by a predetermined distance by spacing solder bands. The printed circuit card is aligned over the spacing solder bands and the first and second solder pad arrangements are wrapped around the first edge such that the first and second solder pad pluralities of solder pads overlay respective first and second pluralities of conductive pads on the printed circuit card. A fixture which may be employed to facilitate the alignment of the solder preform for use with the solder preform is also disclosed.
    • 公开了用于应用于具有第一和第二侧的印刷电路卡的整体焊料预制件,第一边缘以及布置在印刷电路卡的相应第一和第二侧上的第一和第二多个导电焊盘,分别在第一和第二预定导电 垫安排。 整体焊料预制件具有第一和第二多个焊盘,其具有相应的第一和第二焊料焊盘布置,其通过多个桥接焊料带保持在适当的位置。 第一和第二焊盘布置对应于第一和第二预定导电焊盘布置,并且通过间隔焊料带间隔预定距离。 印刷电路卡在间隔焊料带上对准,并且第一和第二焊料焊盘装置围绕第一边缘缠绕,使得第一和第二焊料焊盘多个焊盘覆盖印刷电路上相应的第一和第二多个导电焊盘 卡。 还公开了可用于促进焊料预制件与焊料预制件一起使用的夹具。
    • 33. 发明授权
    • Treatment of indium dusts
    • 铟灰处理
    • US5108497A
    • 1992-04-28
    • US578013
    • 1990-09-05
    • Nicholas B. GomezJohn P. HagerCharles E. T. WhiteLaurence G. Stevens
    • Nicholas B. GomezJohn P. HagerCharles E. T. WhiteLaurence G. Stevens
    • C22B7/02C22B58/00
    • C22B58/00C22B7/02Y02P10/212Y10S75/961
    • Indium-containing feedstocks, such as flue dusts from a refining or smelting process, are treated to increase the concentration of indium and at the same time to reduce the concentrations of lead, copper, and arsenic. The flue dusts are treated in a sodium-doped lead bath at temperatures of 675.degree. to 800.degree. C. Soda ash in the amount of 15 to 35 weight percent is blended with the feed stock and added to the sodium-doped lead bullion. The sodium reacts with the dusts to form a liquid dross, which is removed, cooled, and crushed. The powdered dross is water leached to remove the sodium salts. The indium remains in the filler cake and can be processed by conventional methods for the recovery of indium. About 95% of the indium reports to the filter cake, while lead retention in the filter cake is only about 5-15% of the initial lead content in the dust. A majority of the zinc also reports to the filter cake. A majority of the lead, copper, and silver report to the bullion, and a majority of the arsenic reports to the filtrate. Sodium consumption is about one pound of sodium for each five to ten pounds of feedstock.
    • 处理含铟原料,例如来自精炼或熔炼过程的烟道灰,以增加铟的浓度,同时降低铅,铜和砷的浓度。 烟道灰尘在钠掺杂铅浴中在675℃至800℃的温度下处理。以15-35重量%的量将纯碱与原料混合并加入到钠掺杂的铅块中。 钠与粉尘反应形成液体渣,将其除去,冷却并粉碎。 粉状浮渣是水淋洗以除去钠盐。 铟保留在填料块中,并且可以通过用于回收铟的常规方法进行处理。 铟的约95%报告在滤饼中,而滤饼中的铅保留量仅为灰尘初始含铅量的约5-15%。 大多数锌还报告过滤饼。 大多数铅,铜和银向金块报告,大多数砷报告给滤液。 每5至10磅原料,钠消耗量约为1磅。
    • 37. 发明申请
    • Anti-tombstoning solder alloys for surface mount applications
    • 用于表面贴装应用的反墓碑焊料合金
    • US20020063147A1
    • 2002-05-30
    • US09957196
    • 2001-09-20
    • INDIUM CORPORATION OF AMERICA
    • Benlih HuangNing C. Lee
    • B23K031/00
    • B23K35/262H05K3/3442H05K3/3463
    • The object of this invention is to employ a solder alloy comprising tin/lead/silver in order to provide a wider solidification range and achieve balance between the surface tensions of both side of a small leadless component. The expanded solidification range slows the melting and wetting time so as to balance the surface tension of the molten solder, and in turn reduces the tombstoning frequency. The preferred Ag concentration is 0.2-0.5% in weight, the more preferred Ag concentration is 0.3-0.4% in weight. For reflow soldering of small leadless components, the pastes made with the alloy compositions of Sn62.6Pb37Ag0.4 and Sn63Pb36.6Ag0.4 results in improvements in tombstoning.
    • 本发明的目的是使用包含锡/铅/银的焊料合金,以提供更宽的凝固范围,并实现小型无引线部件的两侧的表面张力之间的平衡。 膨胀的固化范围减缓熔融和润湿时间,以平衡熔融焊料的表面张力,进而降低墓碑频率。 优选的Ag浓度为0.2-0.5重量%,更优选的Ag浓度为0.3-0.4重量%。 对于小型无铅组件的回流焊接,用Sn62.6Pb37Ag0.4和Sn63Pb36.6Ag0.4的合金组成制成的糊料导致了墓碑的改进。
    • 39. 发明授权
    • Technique for increasing the compliance of lead-free solders containing silver
    • 增加含银无铅焊料的合格性的技术
    • US07749340B2
    • 2010-07-06
    • US11550640
    • 2006-10-18
    • Benlih HuangHong-Sik HwangNing-Cheng Lee
    • Benlih HuangHong-Sik HwangNing-Cheng Lee
    • C22C13/00C22C13/02B23K35/34C23C22/00
    • C22C13/00B23K35/262B23K35/3006
    • A technique for technique for increasing the compliance of lead-free solders containing silver is disclosed. In one particular exemplary embodiment, the technique may be realized as a Sn—Ag—Al alloy composition comprising (0.01-20)% Ag, (0.01-2)% Al, balanced with Sn. In another particular exemplary embodiment, the technique may be realized as a Sn—Ag—Cu—Al alloy composition comprising (0.01-20)% Ag, (0.01-1)% Cu, (0.01-2)% Al, balanced with Sn. In still another particular exemplary embodiment, the technique may be realized as a Sn—Ag—Al—Ni composition comprising (0.01-20)% Ag, (0.01-2)% Al, (0.01-4)% Ni, balanced with Sn. In yet another particular exemplary embodiment, the technique may be realized as a Sn—Ag—Cu—Al—Ni alloy composition comprising (0.01-20)% Ag, (0.01-1)% Cu, (0.01-2)% Al, (0.01-4)% Ni, balanced with Sn.
    • 公开了一种提高含银无铅焊料柔顺性的技术。 在一个具体的示例性实施方案中,该技术可以实现为包含与Sn平衡的(0.01-20)%Ag,(0.01-2)%Al,Sn-Ag-Al合金组合物。 在另一特定示例性实施方案中,该技术可以实现为包含(0.01-20)%Ag,(0.01-1)%Cu,(0.01-2)%Al,Sn与Sn平衡的Sn-Ag-Cu-Al合金组合物 。 在另一个具体的示例性实施方案中,该技术可以实现为包含(0.01-20)%Ag,(0.01-2)%Al,(0.01-4)%Ni,与Sn平衡的Sn-Ag-Al-Ni组合物 。 在另一个具体的示例性实施方案中,该技术可以实现为包含(0.01-20)%Ag,(0.01-1)%Cu,(0.01-2)%Al,Sn-Ag-Cu-Al- (0.01-4)%Ni,与Sn平衡。