Robert Boschgmbh

Rolf Speicher

Frieder Haag

Jens Frey

Mathias Bruendel

Markus Niemann

Udo Kaess

Thomas Hilberath

Lutz Rauscher

Volker Haller

Monika Scherer

Gerald Hamm

Juergen Fritz

A method for producing a two-chip assembly includes: providing a wafer having a first thickness, which wafer has a front side and a back side, a first plurality of first chips being provided on the front side of the wafer; attaching a second plurality of second chips on the front side of the wafer, so that every first chip is joined in each instance to a second chip and forms a corresponding two-chip pair; forming a cohesive mold package on the front side of the wafer, so that the second chips are packaged; thinning the wafer from the back side to a second thickness which is less than the first thickness; forming vias from the back side to the second chips; and separating the two-chip pairs into corresponding two-chip assemblies.

Method for producing a two-chip assembly and corresponding two-chip assembly

The quantitative determination of aging effects on motor oil is of great interest. According to a method, two variables of the motor oil are detected, one of the two variables being the viscosity and the other variable being the acid content of the motor oil. A first deviation of the detected first variable from a default value is then determined, and the second variable is estimated based on the deviation. By determining a second deviation of the estimated second variable from the detected second variable, the second deviation is determined as a measure of the aging effect on the motor oil. Since various aging effects influence the two variables in different manners, individual aging effects may be quantitatively determined in a targeted manner.

Method for the quantitative determination of an aging effect on motor oil

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Tuebingen, Germany

Rolf Speicher