Compound semiconductor device and connectors
View Patent ↗A semiconductor device includes a semiconductor substrate formed from compound semiconductor material and multiple conductive connecting pads. The connecting pads are symmetrically arranged on a first surface of the semiconductor substrate in an interweaving pattern. Each cleavage plane extending across the first surface of the semiconductor substrate intersects a portion of at least one connecting pad of the plurality of connecting pads.
1. A semiconductor device, comprising:
a semiconductor substrate comprising compound semiconductor material; and
a plurality of conductive connecting pads symmetrically arranged on a first surface of the semiconductor substrate in an interweaving pattern, at least one of the conductive connecting pads having a complex geometric shape defining an extended portion for providing the interweaving pattern,
wherein each cleavage plane extending across the first surface of the semiconductor substrate intersects a portion of at least one connecting pad of the plurality of connecting pads.
2. The semiconductor device of claim 1 , wherein at least one other conductive connecting pad of the plurality of connecting pads having a complex geometric shape defining a truncated portion complementary to the extended portion of the at least one complex geometric shape defining the extended portion for providing the interweaving pattern.
3. The semiconductor device of claim 2 , wherein each of the plurality of connecting pads comprises gold.
4. The semiconductor device of claim 2 , wherein the compound semiconductor material comprises gallium arsenide (GaAs).
5. The semiconductor device of claim 2 , wherein the compound semiconductor material comprises indium phosphide (InP).
6. The semiconductor device of claim 1 , wherein the symmetrical arrangement of the plurality of connecting pads is configured to prevent tilting of the first surface of the semiconductor substrate with respect to a surface of a mounting device, when the plurality of conductive connecting pads are soldered to the surface of the mounting device.
7. The semiconductor device of claim 6 , wherein the mounting device comprises a printed circuit board.
8. The semiconductor device of claim 1 , further comprising:
a plurality of contacts arranged on a second surface of the semiconductor substrate and contacting electronic circuitry of the semiconductor device, the second surface opposite to the first surface; and
a plurality of interconnectors corresponding to the plurality of connecting pads on the first surface of the semiconductor substrate, each interconnector electrically connecting the corresponding connecting pad to at least one contact on the second surface of the semiconductor substrate.
9. A wafer formed from a compound semiconductor substrate, the wafer comprising a plurality of dies corresponding to semiconductor devices, each die comprising:
a plurality of conductive connecting pads symmetrically arranged on a first surface of the semiconductor substrate, each connecting pad having a complex geometric shape to enable formation of an interweaving pattern of connecting pads; and
a plurality of conductive interconnectors extending through the semiconductor substrate to electrically connect the connecting pads to a trace pattern arranged on a second surface of the semiconductor substrate,
wherein the interweaving pattern of the connecting pads positions a portion of at least one connecting pad along each cleavage plane of the semiconductor substrate.
10. The semiconductor device of claim 9 , wherein at least one complex geometric shape of the connecting pads defines an extended portion, and wherein at least another complex geometric shape defines a truncated portion complementary to the at least one extended portion, to create the interweaving pattern.
11. The semiconductor device of claim 9 , wherein each of the connecting pads comprises gold.
12. The semiconductor device of claim 11 , wherein the compound semiconductor material comprises gallium arsenide (GaAs).
13. The semiconductor device of claim 11 , wherein the compound semiconductor material comprises indium phosphide (InP).
14. An encapsulated semiconductor device, comprising:
a semiconductor substrate comprising gallium arsenide (GaAs);
a plurality of conductive connecting pads symmetrically arranged on a substantially planar bottom surface of the semiconductor substrate in an interweaving pattern, enabling soldering of the semiconductor device to a printed circuit board, wherein each line corresponding to a cleavage plane of the semiconductor substrate and extending across the bottom surface intersects a portion of at least one connecting pad of the plurality of connecting pads;
a circuit arranged on a substantially planar top surface of the semiconductor substrate, the circuit being electrically connected to the plurality of connecting pads via a corresponding plurality of conductive interconnectors extending through the semiconductor substrate; and
a cap covering the top surface of the semiconductor substrate to protect the circuit.
15. The semiconductor device of claim 14 , wherein each connecting pad has a complex geometric shape, at least one complex geometric shape defining an extended portion for providing the interweaving pattern.
16. The semiconductor device of claim 15 , wherein each of the plurality of connecting pads comprises gold and the cap comprises GaAs.
17. The semiconductor device of claim 16 , further comprising:
a sealing ring separating the semiconductor substrate and the cap, the sealing ring defining a sealed air gap between the top surface of the semiconductor substrate and a substantially planar bottom surface of the cap.
18. The semiconductor device of claim 14 , further comprising:
a glass layer covering the bottom surface of the semiconductor substrate, the glass layer defining a plurality of openings corresponding to the plurality of connecting pads to expose an area of each connecting pad.
19. The semiconductor device of claim 18 , wherein the exposed areas of the connecting pads are substantially equal in area.
20. The semiconductor device of claim 19 , wherein the symmetrical arrangement of the plurality of connecting pads is configured to prevent tilting of the bottom surface of the semiconductor substrate with respect to a substantially planar top surface of the printed circuit board during soldering of the semiconductor device to the printed circuit board.