Effect of laminar air flow on probe burn for spring probe
This paper investigates transient heat transfer between a heated spring probe and its air environment. A continuum finite volume simulation is used to analyze of heat flow within and from the resistively heated probe to its environment. Experimental results are conducted for spring probe with laminar air flow and without air flow. The numerical results and experimental results are compared and very good agreement is observed.
Estimation of aluminum and gold bond wire fusing current and fusing time
Wirebonding is the common method for electrically connecting the semiconductor device to the external leads or pins. Permanent damage to wirebonds would occur if the wires could not dissipate the energy, due to excessive current, delivered through the wires. This current overstress damage is recognized as fused bond wires. In this paper, the simplified model developed by Loh (1983) has been used to predict the fusing time and the fusing current of aluminum and gold wires as functions of wire length and wire diameter. In addition, the equation obtained by Loh has been put into more convenient form by eliminating the dependence on the bond wire diameter. Results from both approaches have been presented in graphical form so that package design engineers would be able to estimate the fusing current for a given fusing time. Conversely, the fusing time for a given current passing through the wires could be easily obtained from the design graphs. >
Laminar heat or mass transfer in rectangular channels and in cylindrical tubes for fully developed flow: comparison of solutions obtained for various boundary conditions
Abstract A comparison is made of results obtained with various boundary conditions at the wall of the channels. By comparing blood Sherwood numbers for finite wall resistance with those for constant concentration boundary condition only a small variation is found for various points along the blood channel.