Flux composition and process for use thereof
    55.
    发明授权
    Flux composition and process for use thereof 有权
    助焊剂组合物及其使用方法

    公开(公告)号:US08444774B2

    公开(公告)日:2013-05-21

    申请号:US12731369

    申请日:2010-03-25

    CPC classification number: B23K35/362 Y10T428/12493

    Abstract: The invention relates to a composition of matter comprising a soldering flux, wherein the flux consists essentially of a combination of a fluxing agent and a solvent, and wherein the fluxing agent comprises a keto acid such as levulinic acid or acetylbutyric acid. The flux may also comprises an ester acid, or comprises a mixture of the keto acid with the ester acid. The solvent comprises a mixture of a tacky solvent with a non-tacky solvent. The invention also relates to a process comprising soldering at least two surfaces together, each of which comprises a metal area to which solder can adhere by employing the following steps in any order: applying solder to at least one of the metal areas, aligning the metal areas so that they are superimposed over one another, heating at least one of the areas to a temperature that comprises at least the melting temperature of the solder. The last step comprises joining the superimposed areas to one another. The process employs the flux composition operatively associated with the solder, and in one embodiment the invention comprises a mixture of the flux composition with powdered solder. In another embodiment, the process comprises IMS, C4 and C4NP processes and the solder comprises a lead free solder. The invention also comprises a product produced by the foregoing process or processes.

    Abstract translation: 本发明涉及包含助焊剂的物质组合物,其中助熔剂基本上由助熔剂和溶剂的组合组成,并且其中助熔剂包括酮酸,例如乙酰丙酸或乙酰基丁酸。 助熔剂还可以包含酯酸,或包含酮酸与酯酸的混合物。 溶剂包括粘性溶剂与非粘性溶剂的混合物。 本发明还涉及一种方法,其包括将至少两个表面焊接在一起,每个表面包括金属区域,焊料可以以任何顺序通过以下步骤粘附到该金属区域:将焊料施加到至少一个金属区域,使金属对准 区域,使得它们彼此叠加,将至少一个区域加热至至少包括焊料的熔化温度的温度。 最后一步包括将叠加的区域相互连接。 该方法使用与焊料可操作地相关联的助熔剂组合物,并且在一个实施方案中,本发明包括焊剂组合物与粉末焊料的混合物。 在另一个实施方案中,该方法包括IMS,C4和C4NP方法,焊料包括无铅焊料。 本发明还包括通过前述方法或方法生产的产品。

    Capacity modulation compressor and air conditioning system having the same
    57.
    发明授权
    Capacity modulation compressor and air conditioning system having the same 有权
    容量调节压缩机和空调系统具有相同的性能

    公开(公告)号:US08069685B2

    公开(公告)日:2011-12-06

    申请号:US12320071

    申请日:2009-01-15

    Abstract: Provided is an air conditioning system comprised of a plurality of indoor units connected to each other in parallel, each having an expansion valve, and an outdoor unit including a plurality of compressors, in which at least one of the compressors provided to the outdoor unit is a capacity modulation compressor including an electromotive driving unit for driving a plurality of compression units capable of selectively compressing a working fluid, and the electromotive driving unit for the capacity modulation compressor has a stator with a coil wound around thereon and a rotor rotating inside the stator, the rotor being an LSPRM including a rotor core, flux barriers, permanent magnets and conductive bars.

    Abstract translation: 本发明提供一种空调系统,包括并联连接的多个室内机组,各室具有膨胀阀,以及包括多个压缩机的室外机组,其中设置于室外机组的至少一个压缩机为 一种容量调制压缩机,包括用于驱动能够选择性地压缩工作流体的多个压缩单元的电动驱动单元,并且用于容量调节压缩机的电动驱动单元具有卷绕在其上的线圈的定子和在定子内旋转的转子 转子是包括转子芯,磁通屏障,永磁体和导电棒的LSPRM。

    Method of removing graphitic and/or fluorinated organic layers from the surface of a chip passivation layer having Si-containing compounds
    58.
    发明授权
    Method of removing graphitic and/or fluorinated organic layers from the surface of a chip passivation layer having Si-containing compounds 有权
    从具有含Si化合物的芯片钝化层的表面去除石墨和/或氟化有机层的方法

    公开(公告)号:US07938976B2

    公开(公告)日:2011-05-10

    申请号:US11679247

    申请日:2007-02-27

    Applicant: Kang-Wook Lee

    Inventor: Kang-Wook Lee

    CPC classification number: H01L21/02082

    Abstract: A method for removing undesirable contaminants from a chip passivation layer surface without creating SiO2 particles on the passivation layer, wherein the undesirable contaminants include graphitic layers and fluorinated layers. The use of N2 plasma with optimized plasma parameters can remove through etching both the graphitic and fluorinated organic layers. The best condition for the N2 plasma treatment is to use a relatively low-power within the range of 100-200 W and a relatively high vacuum pressure of N2 in the range of 500-750 mTorr.

    Abstract translation: 一种用于从芯片钝化层表面去除不期望的污染物而不在钝化层上产生SiO 2颗粒的方法,其中不需要的污染物包括石墨层和氟化层。 使用具有优化等离子体参数的N2等离子体可以通过蚀刻石墨和氟化有机层来去除。 N2等离子体处理的最佳条件是在100-200W的范围内使用相对较低的功率,并且在500-750mTorr的范围内使用较高的N2的真空压力。

    Method of removing metallic, inorganic and organic contaminants from chip passivation layer surfaces
    60.
    发明授权
    Method of removing metallic, inorganic and organic contaminants from chip passivation layer surfaces 有权
    从芯片钝化层表面去除金属,无机和有机污染物的方法

    公开(公告)号:US07771541B2

    公开(公告)日:2010-08-10

    申请号:US11689570

    申请日:2007-03-22

    Abstract: A method of removing and/or reducing undesirable contaminants removes residues including graphitic layers, fluorinate layers, calcium sulfate (CaSO4) particles, tin oxides and organotin, from a chip passivation layer surface. The method uses a plasma process with an argon and oxygen mixture with optimized plasma parameters to remove both the graphitic and fluorinated layers and to reduce the level of the inorganic/tin oxides/organotin residue from an integrated circuit wafer while keeping the re-deposition of metallic compounds is negligible. This invention discloses the plasma processes that organics are not re-deposited from polymers to solder ball surfaces and tin oxide thickness does not increase on solder balls. The ratio of argon/oxygen is from about 50% to about 99% Ar and about 1% to about 50% O2 by volume. Incoming wafers, after treatment, are then diced to form individual chips that are employed to produce flip chip plastic ball grid array packages.

    Abstract translation: 去除和/或减少不需要的污染物的方法从芯片钝化层表面去除残留物,包括石墨层,氟化物层,硫酸钙(CaSO 4)颗粒,氧化锡和有机锡。 该方法使用具有优化的等离子体参数的具有氩和氧混合物的等离子体处理以除去石墨和氟化层,并且从集成电路晶片中降低无机/锡氧化物/有机锡残余物的水平,同时保持重新沉积 金属化合物可忽略不计。 本发明公开了等离子体方法,有机物不会从聚合物重新沉积到焊球表面,氧化锡厚度在焊球上不增加。 氩/氧的比例为约50%至约99%Ar和约1%至约50%体积的O 2。 接下来的处理后的晶片被切割成用于制造倒装芯片塑料球栅阵列封装的单个芯片。

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