Transient Thermal Characterization of Junction to Case Thermal Resistance for 2.5D Packages
Package-level thermal characterization suffers from the difficulty such as accurate determination of the junction to case thermal resistance.In the present work,thermal characterization of the 2.5D packages was conducted,with emphasis on the junction to case thermal resistance.For purpose of accurate determination of thermal metrics,the commercially off-the-shelf thermal test chip was assembled,which has been built in with resistors and thermal diodes to act as heaters and sensors.The package were fabricated in either bare-die or molded format.The thermal test chip was assembled on the interposer wafer through microbump and underfill processes.The transient dual interface(TDI)method was utilized to determine Theta JA under natural convection condition and Theta JC with a heat sink.The obtained Theta JC for both bare-die and molded packages are compared with the steady-state measurements based on the cold plate method in previous work.The obtained Theta JC data by the TDI method,without counting in the cold plate thermal resistance,were lower than the cold plate method.Advantages and disadvantages of the TDI method are also discussed.
Junction to case thermal resistance 2.5D package Transient dual interface method (TDI) TIM1 void
Hengyun Zhang Yang Sui Tingyu Lin Haiyan Liu
Shanghai Univ.of Engineering Sci.,333 Longteng Road,Songjiang,Shanghai,China National Center for Advanced Packaging(NCAP China),Wuxi,Jiangsu,China
国际会议
上海
英文
115-120
2018-08-08（万方平台首次上网日期，不代表论文的发表时间）