Patent ID: 6320376
Filing Date: 2001-11-20
Classification: G01R,H01F

Abstract:
A magnetic field sensor comprising:a first conductor layer having a first loop portion which is in an open loop shape and which includes two ends and a gap therebetween;a second conductor layer having a second loop portion formed in an open loop shape on said first conductor layer; anda third conductor layer formed on said second conductor layer and having a third loop portion which is formed in an open loop shape and which has two ends and a gap therebetween,wherein said third loop portion is open in a direction substantially identical with an opening direction of said first loop portion and is formed in such a way that a first straight line, through which one end and other end of said first loop portion are connected with each other, substantially overlaps with a second straight line, through which one end and other end of said third loop portion are connected with each other,said second loop portion is formed in such a way that one side of said second loop portion overlaps with the first and second straight lines of said first loop portion and said third loop portion and that another side of said second loop portion is formed outward with respect to said first loop portion and said second loop portion and crosses over the gaps of said first loop portion and said third loop portion from the one ends of said first loop portion and said third loop portion to the other ends thereof, andthe one side of said second loop portion is electrically connected to the one ends or the other ends of said first loop portion and said third loop portion, thereby forming a loop.