Infineon Technologies Ag

Chu Hua Goh

Kok Yau Chua

Matthias Steiert

Abdul Rahman Mohamed

Christina Yeong

Woon Yau Lim

A method of fabricating a semiconductor device is disclosed. In one aspect, the method includes placing a first semiconductor chip on a carrier with the first main surface of the first semiconductor chip facing the carrier. A first layer of soft solder material is provided between the first main surface and the carrier. Heat is applied during placing so that a temperature at the first layer of soft solder material is equal to or higher than a melting temperature of the first layer of soft solder material. A second layer of soft solder material is provided between the first contact area and the second main surface. Heat is applied during placing so that a temperature at the second layer of soft solder material is equal to or higher than a melting temperature of the second layer of soft solder material. The first and second layers of soft solder material are cooled to solidify the soft solder materials.

Semiconductor device fabricated by flux-free soldering

The electronic device comprises a semiconductor chip comprising a first main face, a second main face opposite to the first main face, side faces connecting the first and second main faces, and a sensor element or actuator element disposed at the first main face, and a substrate, wherein the semiconductor chip is disposed above the substrate, the first main face of the semiconductor chip facing the substrate, wherein the substrate comprises a substrate opening, the substrate opening permitting passage of signals to the sensor element or from the actuator element.

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Malacca, Malaysia

Chu Hua Goh