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    • 2. 发明授权
    • Method and apparatus for thermally induced testing of materials under transient temperature
    • 在瞬态温度下对材料进行热诱导测试的方法和装置
    • US07516674B1
    • 2009-04-14
    • US12198479
    • 2008-08-26
    • Claudius FegerSoojae Park
    • Claudius FegerSoojae Park
    • G01N19/08
    • G01N3/60G01N2203/0066G01N2203/0073G01N2203/027
    • A method for measuring the fracture and fatigue crack growth behavior of a material includes heating at least one sample having a first end and a second end and a pre-applied crack between the first end and the second end; heating a fixture having a lower coefficient of thermal expansion than said at least one sample; attaching the first end and the second end of the at least one sample to the fixture; cooling the at least one sample and fixture; recording the temperature at which propagation of the pre-applied crack through the width of the at least one sample occurs as the critical fracture temperature; for a plurality of samples, each sample having a different ratio of pre-applied crack length to sample width, determining the critical fracture temperature as a function of said ratio; and ranking materials by the critical fracture temperature.
    • 用于测量材料的断裂和疲劳裂纹扩展行为的方法包括加热至少一个具有第一端和第二端的样品和在第一端和第二端之间的预应力裂纹; 加热具有比所述至少一个样品更低的热膨胀系数的固定装置; 将所述至少一个样品的第一端和第二端附接到所述夹具; 冷却至少一个样品和固定装置; 记录预先施加的裂纹的传播通过至少一个样品的宽度的温度作为临界断裂温度; 对于多个样品,每个样品具有不同的预先施加的裂纹长度与样品宽度的比率,确定临界裂纹温度作为所述比例的函数; 并按临界断裂温度对材料进行排序。
    • 6. 发明授权
    • Integrated framework for finite-element methods for package, device and circuit co-design
    • 用于封装,器件和电路协同设计的有限元方法的集成框架
    • US08352230B2
    • 2013-01-08
    • US12723130
    • 2010-03-12
    • Keunwoo KimSoojae Park
    • Keunwoo KimSoojae Park
    • G06F17/50G06G7/62
    • G06F17/50G06F17/5018G06F17/5036G06F2217/40G06F2217/78G06F2217/80
    • Electrical finite element analysis is carried out on a circuit design, which includes devices, to determine an acceptable power-performance envelope and to obtain data for circuit temperature mapping. A circuit temperature map is developed for the circuit design, based on the data for circuit temperature mapping. Thermo-mechanical finite element analysis is carried out on a package design for the circuit design, based on the circuit temperature map, to determine a package reliability limit based on thermal stress considerations. It is determined whether the package design and the circuit design jointly satisfy: (i) power-performance conditions specified in the acceptable power-performance envelope; and (ii) the package reliability limit based on the thermal stress considerations.
    • 电气有限元分析在包括设备的电路设计中进行,以确定可接受的功率性能包络并获得电路温度映射的数据。 基于电路温度映射的数据,开发了电路设计的电路温度图。 基于电路温度图对电路设计的封装设计进行热机械有限元分析,以确定基于热应力考虑的封装可靠性限制。 确定包装设计和电路设计是否共同满足:(i)在可接受的功率性能包络中指定的功率性能条件; 和(ii)基于热应力考虑的封装可靠性限制。