Alpha Omega Semiconductor Inc.

Alpha and Omega Semiconductor (cayman) Ltd.

Yan Yun Xue

Jun Lu

Hamza Yilmaz

Yueh-Se Ho

Yuping Gong

Xiaoming Sui

A combined packaged power semiconductor device includes flipped top source low-side MOSFET electrically connected to top surface of a die paddle, first metal interconnection plate connecting between bottom drain of a high-side MOSFET or top source of a flipped high-side MOSFET to bottom drain of the low-side MOSFET, and second metal interconnection plate stacked on top of the high-side MOSFET chip. The high-side, low-side MOSFET and the IC controller can be packaged three-dimensionally reducing the overall size of semiconductor devices and can maximize the chip's size within a package of the same size and improves the performance of the semiconductor devices. The top source of flipped low-side MOSFET is connected to the top surface of the die paddle and thus is grounded through the exposed bottom surface of die paddle, which simplifies the shape of exposed bottom surface of the die paddle and maximizes the area to facilitate heat dissipation.

Combined packaged power semiconductor device

A dual-side exposed semiconductor package with ultra-thin die and a manufacturing method are disclosed. A die having a source electrode and a gate electrode at top surface is flipped and attached to a die paddle of a lead frame and then is encapsulated with a first molding compound. The first molding compound and the die are ground to reduce the thickness. A mask is applied atop the lead frame with the back of the flipped die exposed and a metal layer is deposited on the exposed area at the back of the flipped die. A metal clip is attached to the back of the flipped die. A second molding compound is deposited on the lead frame with the top surface of the metal clip exposed from the top surface of the second molding compound and the bottom surface of the lead frame exposed from the bottom surface of the second plastic molding compound.

Dual-side exposed semiconductor package with ultra-thin die and manufacturing method thereof

Growing community of inventors

Los Gatos, CA, United States of America

Yan Yun Xue