lengther
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Of the head,center lengther lengths are shorter,outergths longer
完成的层次是layer的反头型曲线
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As the brittleness of low-k material,the traditional wire bonding parameter often lead to die pad crack or Au-AL matter bad;after used low-k material,die size,die pad opening and die pad pitch change to more little,wire change to lengther and density change to more higher,it\' s new challenge for molding and wire bonding;at the same time, low-k material also require to control the thermal stress in package.
由于低介电常数材料的脆性,传统的引线压焊参数设置将会导致焊盘碎裂以及金铝化合物不良;由于使用低介电常数材料后,芯片尺寸、压焊区域和压焊间距进一步减小,金线压焊长度和密度大大增加,这就为压焊和模塑提出了新的要求;同样由于低介电常数材料的应用,对封装体内部的热应力的控制也提出了更高的要求。
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Result:(1)Tau prevented neurons against Mn toxicity of low and middle concentrations. The ideal conditions can reach upon 4. 5 mM Tau added just, nearly no apoptosis cells could be detected.(2)The percentages of apoptosis intogether were lower than those in Mn just , being concentration-dependent relations with Taurine levels.(3)Mn induced DNA damage of neurons with dose-depedent, The higher of Mn concentration, the lengther of the comet tail and the higher percent comet-like cells. Tau incubated could weaken significantly the lesions of Mn towards DNA on the degree.
结果:(1)牛磺酸对中低剂量锰的毒性有一定的拮抗作用,单独加入牛磺酸效果最好剂量是4.5mM,视野下几乎不见凋亡细胞;(2)牛磺酸干预后培养神经细胞凋亡率低于相同剂量的单纯锰培养细胞组,且与牛磺酸浓度呈剂量依赖性;(3)锰引起培养神经细胞DNA损伤,表现在彗星尾长增加,彗星样细胞百分率增加;加入牛磺酸干预后,可明显改善锰造成的培养神经细胞DNA损伤。
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lengther len:加长或者缩短对象
leader le 用旁注线标注尺寸 | lengther len 加长或者缩短对象 | limits 设置和控制绘制图形的界限