Posted On: March 9, 2010 by YCST

E.D. Pa. Chief Judge Harvey Bartle: Claim Construction Op.

Eastern District of Pa. chief judge Harvey Bartle, sitting by designation, recently issued a claim construction memorandum opinion in Magsil Corp. v. Seagate Technology, C.A. No. 08-940 (D. Del. Mar. 1, 2010) (memo. op.). The following terms were construed:

  • "junction" - The Court held that due to the claims' use of "comprising," and the wording of the dependant claims, the use of "junction" did not mean that the claims were "limited to a three layer system of 'electrode, barrier and counter-electrode.'"
  • "a small magnitude of electromagnetic energy" - "that magnitude of electromagnetic energy which is sufficient to reverse the magnetization direction of the electrode or film layer with a lower coercive force (thereby achieving a change in resistance of at least 10%) but less than the amount necessary to reverse the magnetization direction of the electrode or film layer with a higher coercive force."
  • "Reverses at Least One of the Magnetization Directions" - "a turning or change of the magnetization direction of at least one of the electrodes or film layers, towards an opposing alignment, to such a degree as necessary to achieve at least a 10% change in resistance."
  • "A Change In the Resistance By at Least 10%" - 'a change in the resistance of at least 10% by using the formula ΔR/R = (R1 -R2)/R1, where ΔR/R is the percent change in 1 magnetization direction, R1 is the resistance of the junction 8 before the application of electromagnetic energy reverses at least one of the magnetization directions, and R2 is the resistance of the junction after the application of electromagnetic energy and the resultant reversal of at least one of the magnetization directions."
  • "At Room Temperature" - "a device which causes a change in resistance of at least 10% 'at room temperature' is a device capable of achieving such resistance without actively manipulating the temperature of the device, that is, that the device is capable of achieving a 10% change in resistance while operating within a room-temperature environment."
  • "Stepping Motor" - "an electric motor that is capable of moving only in small, discrete increments."
  • "Linearly Driving the Actuator" - "driving the actuator in a straight line"

Magsil Corp. v. Seagate Technology, C.A. No. 08-940 (D. Del. Mar. 1, 2010)