Effect of flip chip bonding parameters on microstructure at the interconnect interface and shear properties of 64.8Sn35.2Pb microbumps were investigated in this work.Results show that the main intermetallic compound(I...Effect of flip chip bonding parameters on microstructure at the interconnect interface and shear properties of 64.8Sn35.2Pb microbumps were investigated in this work.Results show that the main intermetallic compound(IMC)at the interconnect interface is(Ni,Cu)_(3)Sn_(4)phase,and meanwhile a small amount of(Cu,Ni)_(6)Sn_(5)phase with a size of 50−100 nm is formed around(Ni,Cu)_(3)Sn_(4)phase.The orientation relationship of[-1-56](Ni,Cu)_(3)Sn_(4)//[152](Cu,Ni)_(6)Sn_(5)and(601)(Ni,Cu)_(3)Sn_(4)//(-201)(Cu,Ni)_(6)Sn_(5)is found between these two phases,and the atomic matching at the interface of the two phases is low.The highest shear force of 77.3 gf is achieved in the 64.8Sn35.2Pb microbump at the peak temperature of 250℃and parameter V1 because dense IMCs and no cracks form at the interconnect interface.Two typical fracture modes of microbumps are determined as solder fracture and mixed fracture.The high thermal stress presenting in the thick IMCs layer induces crack initiation,and cracks propagate along theα/βphase boundaries in the Sn-Pb solder under shear force,leading to a mixed fracture mode in the microbumps.展开更多
目的:观察针灸对急性带状疱疹患者血液c-FLIP表达的影响,初步探讨其治疗带状疱疹的机制。方法:选择急性带状疱疹患者25例,随机分为药物治疗组(P组,n=13)和针灸治疗组(A组,n=12),选择12例正常人作为对照。P组采用抗病毒、营养神经和镇痛...目的:观察针灸对急性带状疱疹患者血液c-FLIP表达的影响,初步探讨其治疗带状疱疹的机制。方法:选择急性带状疱疹患者25例,随机分为药物治疗组(P组,n=13)和针灸治疗组(A组,n=12),选择12例正常人作为对照。P组采用抗病毒、营养神经和镇痛药物治疗,A组在相同药物治疗基础上加针灸治疗。比较两组患者治疗前、治疗后7 d VAS评分和皮疹愈合时间;Western-blot法检测c-FLIP表达,比较正常对照组与急性带状疱疹患者及两组患者治疗前、后血液c-FLIP表达情况。结果:两组患者治疗后VAS评分较治疗前均明显减少(P<0.01),治疗后组间VAS评分比较差异无统计学意义,A组皮疹愈合时间短于P组(P<0.01);急性带状疱疹患者c-FLIP表达比正常人表达明显降低(P<0.01),A组治疗后较治疗前表达升高(P<0.01),P组治疗前、后表达无明显变化。结论:针灸可以调节急性带状疱疹患者血液c-FLIP表达,促进皮疹愈合。这可能是针灸治疗带状疱疹的细胞免疫机制之一。展开更多
目的 :探讨 c FL IP(细胞型 Fas相关死亡区域蛋白样白介素 - 1β转换酶抑制蛋白 ) m RNA在大肠癌细胞中的表达及其与 Fas抗原 (CD95 )表达的相关性。方法 :应用 RT- PCR方法检测 3株人大肠癌细胞株中 c- FL IP m RNA的表达 ,采用间接免...目的 :探讨 c FL IP(细胞型 Fas相关死亡区域蛋白样白介素 - 1β转换酶抑制蛋白 ) m RNA在大肠癌细胞中的表达及其与 Fas抗原 (CD95 )表达的相关性。方法 :应用 RT- PCR方法检测 3株人大肠癌细胞株中 c- FL IP m RNA的表达 ,采用间接免疫荧光标记流式细胞术检测大肠癌细胞 Fas抗原表达。结果 :SW1116及 SW6 2 0细胞株 c- FL IP m RNA表达阳性并相对高水平表达 Fas抗原 ,而 L o Vo细胞株 c- FL IP m RNA表达阴性并低水平表达 Fas抗原。结论 :在大肠癌细胞中 ,c- FL IP m RNA的表达趋势与 Fas抗原一致 ,提示 c- FL IP可能在抑制 Fas抗原诱导的细胞凋亡中发挥重要作用。展开更多
基金Project(U2341254)supported by Ye Qisun Science Foundation of National Natural Science Foundation of ChinaProject(52475406)supported by the National Nature Science Foundation of ChinaProject(2024CY2-GJHX-32)supported by the Key R&D Program of Shaanxi Province,China。
文摘Effect of flip chip bonding parameters on microstructure at the interconnect interface and shear properties of 64.8Sn35.2Pb microbumps were investigated in this work.Results show that the main intermetallic compound(IMC)at the interconnect interface is(Ni,Cu)_(3)Sn_(4)phase,and meanwhile a small amount of(Cu,Ni)_(6)Sn_(5)phase with a size of 50−100 nm is formed around(Ni,Cu)_(3)Sn_(4)phase.The orientation relationship of[-1-56](Ni,Cu)_(3)Sn_(4)//[152](Cu,Ni)_(6)Sn_(5)and(601)(Ni,Cu)_(3)Sn_(4)//(-201)(Cu,Ni)_(6)Sn_(5)is found between these two phases,and the atomic matching at the interface of the two phases is low.The highest shear force of 77.3 gf is achieved in the 64.8Sn35.2Pb microbump at the peak temperature of 250℃and parameter V1 because dense IMCs and no cracks form at the interconnect interface.Two typical fracture modes of microbumps are determined as solder fracture and mixed fracture.The high thermal stress presenting in the thick IMCs layer induces crack initiation,and cracks propagate along theα/βphase boundaries in the Sn-Pb solder under shear force,leading to a mixed fracture mode in the microbumps.
文摘目的:观察针灸对急性带状疱疹患者血液c-FLIP表达的影响,初步探讨其治疗带状疱疹的机制。方法:选择急性带状疱疹患者25例,随机分为药物治疗组(P组,n=13)和针灸治疗组(A组,n=12),选择12例正常人作为对照。P组采用抗病毒、营养神经和镇痛药物治疗,A组在相同药物治疗基础上加针灸治疗。比较两组患者治疗前、治疗后7 d VAS评分和皮疹愈合时间;Western-blot法检测c-FLIP表达,比较正常对照组与急性带状疱疹患者及两组患者治疗前、后血液c-FLIP表达情况。结果:两组患者治疗后VAS评分较治疗前均明显减少(P<0.01),治疗后组间VAS评分比较差异无统计学意义,A组皮疹愈合时间短于P组(P<0.01);急性带状疱疹患者c-FLIP表达比正常人表达明显降低(P<0.01),A组治疗后较治疗前表达升高(P<0.01),P组治疗前、后表达无明显变化。结论:针灸可以调节急性带状疱疹患者血液c-FLIP表达,促进皮疹愈合。这可能是针灸治疗带状疱疹的细胞免疫机制之一。
文摘目的 :探讨 c FL IP(细胞型 Fas相关死亡区域蛋白样白介素 - 1β转换酶抑制蛋白 ) m RNA在大肠癌细胞中的表达及其与 Fas抗原 (CD95 )表达的相关性。方法 :应用 RT- PCR方法检测 3株人大肠癌细胞株中 c- FL IP m RNA的表达 ,采用间接免疫荧光标记流式细胞术检测大肠癌细胞 Fas抗原表达。结果 :SW1116及 SW6 2 0细胞株 c- FL IP m RNA表达阳性并相对高水平表达 Fas抗原 ,而 L o Vo细胞株 c- FL IP m RNA表达阴性并低水平表达 Fas抗原。结论 :在大肠癌细胞中 ,c- FL IP m RNA的表达趋势与 Fas抗原一致 ,提示 c- FL IP可能在抑制 Fas抗原诱导的细胞凋亡中发挥重要作用。
