1. A component frame assembly for a patient lift device, the component frame assembly comprising:
first and second opposed frame plates, and at least one plate connector connecting the plates, the plates and plate connector being sized, shaped and positioned such that the plates are separated by an interior component space and so as to define an opening to the interior component space between an edge of the first plate and an edge of the second plate, each plate having an inner side facing the interior component space and an opposite outer side;
a force transmitter coupled to the plates and positioned in the interior component space;
a force applicator mounted to the outer side of one of the first and second frame plates.
2. A component frame assembly as claimed in claimed 1, wherein the force transmitter comprises a gear assembly.
3. A component frame assembly as claimed in claim 1, where the force applicator comprises a motor.
4. A component fame assembly as claimed in claim 3, the assembly further comprising a controller mounted to the outer side of one of the first and second frame plates.
5. A component frame assembly as claimed in claim 4, the assembly further comprising a power source, the power source being coupled to the plates and positioned on an outer side of one of the plates.
6. A component frame assembly as claimed in claim 1, wherein the opening extends over at least fifty percent of the perimeter of the plates.
7. A component frame assembly as claimed in claim 1, wherein the assembly includes a patient connector retraction and extension device positioned in the interior component space adjacent said opening.
8. A component frame assembly as claimed in claim 7, wherein the patient connector retraction and extension device comprises a spool for retracting and extending a patient connector.
9. A component frame assembly as claimed in claim 4, wherein the assembly further comprises at least one limit switch to limit operation of the motor, the limit switch being positioned on an outer side of one of the plates.
10. A component frame assembly as claimed in claim 4, wherein the assembly further comprises at least one current-controlling fuse, the fuse being positioned on an outer side of one of the plates.
11. A component frame assembly as claimed in claim 5, wherein the power source comprises a pair of batteries.
12. A component frame assembly as claimed in claim 4, wherein the controller comprises a circuit board that includes control circuitry.
13. A component frame assembly as claimed in claim 12, wherein the assembly further comprises a power source coupled to the plates and positioned on an outer side of one of the plates, and wherein the circuit board is positioned between one of the plates and the power source.
14. A component frame assembly as claimed in claim 4, wherein the motor is positioned on an outer side of the first plate.
15. A component frame assembly as claimed in claim 14, wherein the assembly further comprises at least one limit switch to limit operation of the motor, the limit switch being positioned on the outer side of the first plate.
16. A component frame assembly as claimed in claim 15, wherein the controller is positioned on an outer side of the second plate.
17. A component frame assembly as claimed in claim 16, wherein the assembly further comprises a power source, the power source being coupled to the plates and positioned toward an outer side of the second plate.
The claims below are in addition to those above.
All refrences to claims which appear below refer to the numbering after this setence.
1. A rolled-up inductor structure for a radiofrequency integrated circuit (RFIC), the rolled-up structure comprising:
a multilayer sheet in a rolled configuration comprising multiple turns about a longitudinal axis, the multilayer sheet comprising a conductive pattern layer on a strain-relieved layer,
wherein the conductive pattern layer comprises:
at least one conductive strip having a length extending in a rolling direction, the at least one conductive strip thereby wrapping around the longitudinal axis in the rolled configuration; and
two conductive feed lines connected to the at least one conductive strip for passage of electrical current therethrough,
wherein the conductive strip is an inductor cell of the rolled-up inductor structure.
2. The rolled-up inductor structure of claim 1, further comprising a plurality of the conductive strips disposed along the direction of the longitudinal axis and connected in series by connecting lines.
3. The rolled-up structure of claim 2 comprising n of the conductive strips, n being an even number from 2 to 20, and further comprising n\u22121 of the connecting lines.
4. The rolled-up inductor structure of claim 2, wherein a first connecting line connects a base of a first conductive strip to a top of a second conductive strip, and a second connecting line connects a base of the second inductor cell to a top of a third inductor cell, such that the electrical current passes through adjacent conductive strips in the same direction.
5. The rolled-up inductor structure of claim 4, wherein each of the connecting lines defines an angle \u03b8 with respect to a side of one of the conductive strips, the angle \u03b8 ranging from about 30\xb0 to about 60\xb0.
6. The rolled-up inductor structure of claim 2, wherein a first connecting line connects a base of a first conductive strip to a base of a second conductive strip, and a second connecting line connects a top of the second conductive strip to a top of a third conductive strip, such that electrical current passes through adjacent conductive strips in opposing directions.
7. The rolled-up inductor structure of claim 6, wherein the connecting lines are aligned substantially parallel to the longitudinal axis.
8. The rolled-up inductor structure of claim 2, wherein the two conductive feed lines are connected to first and second ends of the plurality of the conductive strips.
9. The rolled-up inductor structure of claim 1, wherein the two conductive feed lines extend away from the at least one conductive strip in a rolling direction.
10. The rolled-up inductor structure of claim 1, wherein the strain-relieved layer comprises two layers, and wherein, in an unrolled configuration of the multilayer sheet, a top layer of the two layers is in tension and a bottom layer of the two layers is in compression.
11. The rolled-up inductor structure of claim 10, wherein each of the two layers comprises non-stoichiometric silicon nitride.
12. The rolled-up inductor structure of claim 1, wherein the conductive pattern layer comprises one or more materials selected from the group consisting of carbon, silver, gold, aluminum, copper, molybdenum, tungsten, zinc, palladium, platinum, and nickel.
13. The rolled-up inductor structure of claim 1, wherein the conductive pattern layer comprises a thickness of from about 10 nm to about 100 nm.
14. The rolled-up inductor structure of claim 1, wherein a ratio of the thickness of the conductive pattern layer to an inner diameter of the rolled configuration of the multilayer sheet is at least about 0.005.
15. The rolled-up inductor structure of claim 1, wherein the rolled configuration of the multilayer sheet comprises at least about 10 turns.
16. The rolled-up inductor structure of claim 1, wherein the length of the at least one conductive strip is aligned substantially parallel to a rolling direction of the rolled configuration.
17. The rolled-up inductor structure of claim 1, wherein the rolled configuration of the multilayer sheet comprises an on-wafer footprint of about 5000 \u03bcm2 or less.
18. A device comprising:
a plurality of the rolled-up inductor structures of claim 1 on a substrate, wherein the rolled-up inductor structures are components of a radiofrequency integrated circuit (RFIC), the substrate comprising a semiconductor.
19. A method of making a rolled-up inductor structure for a radiofrequency integrated circuit (RFIC), the method comprising:
forming a sacrificial layer on a substrate;
forming a strained layer on the sacrificial layer, the strained layer comprising an upper portion under tensile stress and a lower portion under compressive stress, the strained layer being held on the substrate by the sacrificial layer;
forming a conductive pattern layer on the strained layer, the conductive pattern layer comprising at least one conductive strip having a length extending in a rolling direction;
initiating removal of the sacrificial layer from the substrate, thereby releasing an end of the strained layer, and
continuing the removal of the sacrificial layer, thereby allowing the strained layer to move away from the substrate and roll up to relieve strain in the strained layer, the conductive pattern layer adhering to the strained layer during the roll-up, thereby forming a rolled-up inductor structure,
wherein, after the roll-up, the at least one conductive strip wraps around the longitudinal axis, the at least one conductive strip being an inductor cell of the rolled-up inductor structure.
20. The method of claim 19, further comprising transferring the rolled-up structure to a different substrate.