1. A semiconductor device, comprising:
a circuit carrier with a number of internal contact areas, which comprise a first material with a first electrochemical potential;
a semiconductor chip with an active surface and a back side, the active surface having a number of chip contact areas, which comprise a second material with a second electrochemical potential; and
bonding wire connections between the chip contact areas and the internal contact areas of the circuit carrier, the bonding wires comprising a third material with a third electrochemical potential;
connecting points between the chip contact areas and the bonding wires and connecting points between the internal contact areas and the bonding wires being coated with an anticorrosive layer; and
wherein the surfaces of the semiconductor chip other than those immediately adjacent the connecting points between the bonding wires and the chip contact areas and the surfaces of the circuit carrier other than those immediately adjacent the connecting points between the bonding wires and the internal contact areas remain free from, the anticorrosive layer; and
wherein the anticorrosive layer includes a first polymer layer directed towards the connecting points between the bonding wires and the chip contact areas and the surfaces of the circuit carrier with end groups which have a particular affinity with material of the connecting point, and a second polymer layer directed towards a plastic compound encapsulating the bonding wires with end groups which have a particular affinity with the plastic compound.
2. The semiconductor device as claimed in claim 1, wherein the polymer layer comprises one or more of the following substances:
imidazoles
polyisocyanates
liquid-crystalline polymers
high-temperature resistant thermoplastics
phenolic resins
amino resins
unsaturated polyesters
polybenzoxazoles
polyoxazole
polybenzimidazoles
polyimides
epoxies
polyurethanes
polymers with sulfur in the main chain
polymers with sulfur in the secondary chain.
3. The semiconductor device as claimed in claim 1, wherein the polymer layer additionally comprises in main chains andor secondary chains one or more of the following functional groups:
sulfone group
mercapto group
amino group
carboxyl group
cyano group
keto group
hydroxyl group
silano group
titano group.
4. The semiconductor device as claimed in claim 1, wherein the anticorrosive layer comprises one or more copolymers.
5. The semiconductor device as claimed in claim 1, wherein the anticorrosive layer comprises a mixture of two or more polymers.
6. The semiconductor device as claimed in claim 1, wherein the anticorrosive layer comprises one or more layers, each layer having one or more polymers.
7. The semiconductor device as claimed in claim 1, wherein the anticorrosive layer comprises one or more of the following auxiliaries:
solvents
adhesion promoters
antioxidants
catalysts
reinforcing fillers
plasticizers
UV stabilizers.
8. The semiconductor device as claimed in claim 1, comprising wherein middle regions of the bonding wires remain free of the anticorrosive layer.
9. The semiconductor device as claimed in claim 1, wherein the semiconductor chip and the bonding wires are embedded in a plastic compound.
10. The semiconductor device as claimed in claim 1, comprising wherein the third material of the bonding wires has a more positive electrochemical potential than the second material of the chip contact areas.
11. The semiconductor device as claimed in claim 1, comprising wherein the third material of the bonding wires has a more positive electrochemical potential than the first material of the internal contact areas.
12. The semiconductor device as claimed in claim 1, comprising wherein the chip contact areas comprise aluminum or an aluminum alloy and the bonding wires comprise gold or a gold alloy.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A motor, comprising a stator assembly and a rotor assembly inserted into the stator assembly, wherein
the stator assembly comprises a stator core and a winding;
the stator core comprises a yoke and a plurality of teeth protruding inwards from the yoke;
between two adjacent teeth formed is a winding slot;
the winding is arranged in the winding slot, and winded on the teeth;
the rotor assembly comprises a rotor core and a permanent magnet;
the rotor core comprises an annular ring having a central axial bore and a plurality of magnetic induction blocks protruding outwards from an outer side of the annular ring;
between two adjacent magnetic induction blocks formed is a radial recess for mounting the permanent magnet;
the magnetic induction blocks at both sides of an opening of the radial recess protrude with a hook block; and
a thickness of the rotor core is larger than that of the stator core.
2. The motor of claim 1, wherein a thickness difference between the rotor core and the stator core is 3-50 mm.
3. The motor of claim 2, wherein a thickness difference between the rotor core and the stator core is 3-20 mm.
4. The motor of claim 3, wherein a thickness difference between the rotor core and the stator core is 3-10 mm.
5. The motor of claim 1, wherein a section of an outer side surface of the magnetic induction blocks is a circular-arc line and the outer side surface employs a point with a distance deviating from the center of the central axial bore as a center of circle.
6. The motor of claim 2, wherein a section of an outer side surface of the magnetic induction blocks is a circular-arc line and the outer side surface employs a point with a distance deviating from the center of the central axial bore as a center of circle.
7. The motor of claim 3, wherein a section of an outer side surface of the magnetic induction blocks is a circular-arc line and the outer side surface employs a point with a distance deviating from the center of the central axial bore as a center of circle.
8. The motor of claim 4, wherein a section of an outer side surface of the magnetic induction blocks is a circular-arc line and the outer side surface employs a point with a distance deviating from the center of the central axial bore as a center of circle.
9. The motor of claim 5, wherein a section of an inner side surface of the tooth comprises an outer arc line bending inwards in the center and outer cutting edges at both sides, and the inner side surface of the tooth matches the outer side surface of the magnetic induction block.
10. The motor of claim 6, wherein a section of an inner side surface of the tooth comprises an outer arc line bending inwards in the center and outer cutting edges at both sides, and the inner side surface of the tooth matches the outer side surface of the magnetic induction block.
11. The motor of claim 7, wherein a section of an inner side surface of the tooth comprises an outer arc line bending inwards in the center and outer cutting edges at both sides, and the inner side surface of the tooth matches the outer side surface of the magnetic induction block.
12. The motor of claim 8, wherein a section of an inner side surface of the tooth comprises an outer arc line bending inwards in the center and outer cutting edges at both sides, and the inner side surface of the tooth matches the outer side surface of the magnetic induction block.
13. The motor of claim 9, wherein the outer arc line is a circular-arc line.
14. The motor of claim 10, wherein the outer arc line is a circular-arc line.
15. The motor of claim 11, wherein the outer arc line is a circular-arc line.
16. The motor of claim 12, wherein the outer arc line is a circular-arc line.
17. The motor of claim 5, wherein the outer edge of the section of the stator core comprises a plurality of tangent lines, and a mounting hole is arranged on the stator core near the tangent lines.
18. The motor of claim 6, wherein the outer edge of the section of the stator core comprises a plurality of tangent lines, and a mounting hole is arranged on the stator core near the tangent lines.
19. The motor of claim 7, wherein the outer edge of the section of the stator core comprises a plurality of tangent lines, and a mounting hole is arranged on the stator core near the tangent lines.
20. The motor of claim 8, wherein the outer edge of the section of the stator core comprises a plurality of tangent lines, and a mounting hole is arranged on the stator core near the tangent lines.