Off-set reduced hall element

Details Off-set reduced hall element Off-set reduced hall element

G - Physics

01

R

G01R 33/07 (2006.01) H01L 43/04 (2006.01)

Patent

CA 2389705

A Hall element comprises a region (100) having a non-zero Hall constant, a first contact (K1) for supplying an operating current (I) to said region (100), a third contact (K3) for conducting the operating current (I) from said region (100), said first and third contacts defining a direction of the operating current within said region, a second (K2) and a fourth contact (K4) for tapping a Hall voltage, and a conductor pattern (10) connected to the first contact or to the third contact and substantially surrounding said region laterally or being arranged above or below said region. The conductor pattern has the effect that the intrinsic field of the operating current through the Hall element is suppressed outside the Hall element such that the Hall element effects an at least reduced offset in adjacent Hall elements. In addition thereto, the arrangement of the conductor pattern has the effect that effects of the current return on the Hall voltage generated by the Hall element itself are also at least reduced. An offset reduction is possible simultaneously on an element, by way of suitable implementation, also for both operating current directions in a spinning-current operating mode.

L'invention concerne un élément à effet Hall comprenant une zone (100) présentant une constante de Hall différente de zéro, un premier contact (K1) servant à acheminer un courant de service (I) jusqu'à la zone, un troisième contact (K3) pour évacuer le courant de service (I) de ladite zone, le premier et le troisième contact définissant un sens de courant de service dans la zone, ainsi qu'un deuxième (K2) et un quatrième contact (K4) pour prélever une tension à effet Hall et une structure conductrice (10) qui est connectée au premier contact ou au troisième contact et entoure sensiblement la zone latéralement ou se situe au-dessus ou en dessous de ladite zone. La structure conductrice fait que d'une part le champ propre du courant de service est supprimé par l'élément à effet Hall en dehors dudit élément à effet Hall, de manière que ledit élément à effet Hall induise au moins un décalage réduit dans les éléments à effet Hall adjacents. La configuration de la structure conductrice fait en outre que les effets de la réaction d'intensité sur la tension à effet Hall produite même par l'élément à effet Hall se trouvent également au moins réduits.

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