Apparatus, device and method for generating magnetic field gradient
First Claim
1. A magnetic device comprising:
- a monolithic body having formations, said formations producing a magnetic field gradient; and
a MEMS device with an array of actuators such that each of said actuators is placed above each of said formations.
3 Assignments
0 Petitions
Accused Products
Abstract
A monolithic or dual monolithic magnetic device or apparatus having an array of formations such as protruding or raised nubs wherein adjacent nubs have the same or opposite polarity to produce a high magnetic field gradient in the vicinity of the nubs is described. In lieu of nubs, the use of a magnetic device with thru-holes, blind holes, filled holes, or iron flux concentrators is also detailed, wherein all embodiments result in regions of high magnetic field gradient. Apparatus and methods for spot-poling a magnet array are also illustrated.
An application of an array of MEMS actuators using the magnets of the present invention to produce high field gradient at precise locations is described. A further application of a biochemical separation unit containing a magnetic array and micro-fluidic channels for separating out magnetic particles tagged with bio-specific molecules for sensing the presence of a disease or specified chemicals is also described.
48 Citations
84 Claims
-
1. A magnetic device comprising:
-
a monolithic body having formations, said formations producing a magnetic field gradient; and a MEMS device with an array of actuators such that each of said actuators is placed above each of said formations. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36)
-
-
37. A magnetic device comprising:
a monolithic body having formations, said formations producing a magnetic field gradient; and
a biochemical separation unit capable of separating out magnetic particles.
-
38. A dual monolithic magnetic device comprising:
-
a first monolithic body having first formations, and a second monolithic body having second formations, wherein said first monolithic body is placed on said second monolithic body producing a magnetic field gradient; and a MEMS device having an array of actuators wherein each actuator is placed above each of said first formations. - View Dependent Claims (39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60)
-
-
61. A dual monolithic magnetic device comprising:
-
a first monolithic body having first formations, a second monolithic body having second formations, wherein said first monolithic body is placed on said second monolithic body producing a magnetic field gradient; and
a biochemical separation unit capable of separating out magnetic particles.
-
-
62. A dual monolithic magnetic device comprising:
-
a first monolithic body having first formations, and a second monolithic body, wherein first monolithic body is placed on second monolithic body producing a magnetic field gradient; and a MEMS device having an array of actuators wherein each actuator is placed above each of said first formations. - View Dependent Claims (63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83)
-
-
84. A dual monolithic magnetic device comprising:
-
a first monolithic body having first formations, and a second monolithic body, wherein first monolithic body is placed on second monolithic body producing a magnetic field gradient; and
a biochemical separation unit capable of separating out magnetic particles.
-
Specification