Die Gas-Accord-Harmonika

Fluxless Die Attach by Activated Forming Gas

Eutectic god-tin (Au80Sn20) is widely used as the die-attach material for making radio-frequency (RF) and microwave devices. The metallic bonding is typically achieved by soldering using a gold-tin preform in a forming gas containing hydrogen (H2) and nitrogen (N2) to a peak temperature at 300 ̊C. The performance and reliability of the devices are strongly dependent on the quality of the die-att...

Ultrasonic Inspection of Gas Porosity Defects in Aluminium Die Castings

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SUSY Les Houches Accord 2

The Supersymmetry Les Houches Accord (SLHA) [1] provides a universal set of conventions for conveying spectral and decay information for supersymmetry analysis problems in high energy physics. Here, we propose extensions of the conventions of the first SLHA to include various generalisations: the minimal supersymmetric standard model with violation of CP, R-parity, and flavour, as well as the s...

New Basel Capital Accord

A Labor Supply Elasticity Accord ?

Strong differences of opinion about the labor supply elasticity prevail. One camp infers that the aggregate labor supply elasticity is large because big fluctuations in aggregate hours of work occur in response to small fluctuations in workers’ productivity over the business cycle (Prescott 2005). Another camp points to estimates of low labor supply elasticities from microeconometric studies of...