Motorola Corporation

Lonne L Mays

Hiep M Le

Alexander James Elliott

Mark D Mosher

Jean-Baptiste Martin

James G Lippmann

Alexandra Hubenko

Albert E Tavares

A method of passivating a semiconductor substrate includes singulating (13) a semiconductor substrate (23) from a semiconductor wafer, coupling (14) a heatsink (21) to the semiconductor substrate (23), etching (15) the semiconductor substrate (23) in a chamber of an etch tool, and passivating (17) the semiconductor substrate (23) with an oxide layer (31). The semiconductor substrate (23) is kept in the chamber of the etch tool from the etching (15) step through the passivating (17) step. The etching (15) of the semiconductor substrate (23) does not substantially etch the heatsink (21), and the passivating (17) of the semiconductor substrate (23) does not substantially passivate the heatsink (21).

Method of passivating a semiconductor substrate

A package (10) has outermost surfaces (12, 13, 14, 16) that form a polygon shape. The body (11) of the package (10) has axial symmetry about an axis (21). A lead (22) exits the package along the axis (21).

Electronic package and method

A semiconductor diode device (10) includes two heatsinks (11, 12), a semiconductor substrate (15) having a p-n junction (35) and located between the two heatsinks (11, 12), solder (13, 14) between the heatsinks (11, 12) and the semiconductor substrate (15), and a packaging material (16) covering the semiconductor substrate (15), the solder (13, 14), and a portion of the two heatsinks (11, 12). The two heatsinks (11, 12) each have a curved surface (21, 22), which reduces tilting of the semiconductor substrate (15), reduces temperature gradients across surfaces (23, 24) of the semiconductor substrate (15), and improves the reliability of the semiconductor diode device (10). The two heatsinks (11, 12) also include protrusions (19, 20), which help to keep the packaging material (16) covering the curved surfaces (21, 22) of the heatsinks (11, 12).

Semiconductor diode device with non-planar heatsink and method of

An electronic component has a body (11) that is formed from a mold compound that includes a thermoplastic material (31), a first filler (32) comprised of an electrically insulative material wherein the first filler (32) is more thermally conductive than the thermoplastic material (31), and a second filler (33) comprised of an electrically conductive material wherein the second filler (33) is more thermally conductive than the thermoplastic material (31).

Mold compound

A surface mount package (10) includes a leadframe (14) facing away from the mounting surface such that the primary heat path is away from the mounting surface. The package may be a modified TO-220, wherein the tab (16) of the leadframe is bent down toward the mounting surface, and the leads (20) are bent down and under the package. Such an embodiment provides for a small footprint and is relatively easy to manufacture.

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Gilbert, AZ, United States of America

Lonne L Mays