Kawasaki Jukogyo Kabushiki Kaisha v. Rorze Corporation

Background

This patent case concerns robots that transfer semiconductor wafers between manufacturing equipment. The robots operate in an enclosed “interface space” and retrieve wafers from sealed containers called front opening unified pods, or “FOUPs.” The patents aim to prevent the robot arms from colliding with the FOUP openers and their doors.

Kawasaki claimed that Rorze Corporation and Rorze Automation, Inc. infringe U.S. Reissue Patent Nos. RE45,772; RE46,465; RE47,145; RE47,909; and RE48,031. The patents are reissues of U.S. Patent No. 7,874,782 and share a specification. The parties disputed the construction—the legal meaning and scope—of ten claim terms.

Court’s Analysis and Constructions

The court applied the ordinary meaning of claim terms as understood by a person of ordinary skill in the relevant technology, considering the claims, patent specification, prosecution history, and other evidence. It also addressed whether some terms were subject to a patent-law rule for functional claiming under 35 U.S.C. § 112(f), or were indefinite under Section 112.

1. “A FOUP opener.” The court held that “FOUP opener” names a structure and is not a functional claim term subject to Section 112(f). It adopted Kawasaki’s proposal and required no further construction.

2. “An interface space.” The court construed this term as “the volume enclosed by the six walls of the interface space forming portion, not including the volume of any openings in those walls.” The court rejected the argument that the openings in the walls were part of the interface space.

3. “The length B.” The court construed this term as “the forward-backward length of the interface space, measured from the interior face of the front wall to the interior face of the rear wall.” It rejected Kawasaki’s proposed measurement from the outside of the front wall.

4. “Measured from the front wall.” The court construed this phrase as “measured from the interior surface of the front wall in the forward and backward directions.”

5. “A robot invasion restricted region.” The court construed this term as “the region extending the distance E in the forward-backward direction measured from the interior surface of the front wall, where E is the farthest distance any part of the FOUP opener mechanism extends into the interface space (including while moving).”

6. “Movement of the FOUP opener.” The court found that this phrase required no further construction. It rejected Rorze’s proposed language because it did not make the claim clearer and improperly focused on particular doors and horizontal movement.

7. “Minimum transformed state.” The court adopted no further construction. Although Rorze had identified the term in its invalidity contentions, the parties did not dispute the term’s meaning. The court declined to decide at this stage whether the claims satisfied Section 112’s written-description and enablement requirements.

8. “Plurality of link members.” The court adopted no further construction. The parties disputed validity rather than meaning, and the court left those invalidity arguments for possible resolution with a dispositive motion.

9. “Wafer container” and “substrate container.” The court construed both terms to mean “FOUP.” It relied on the specification and claim language, which used the terms interchangeably with FOUP.

The opinion identifies ten disputed terms, but the ninth item addresses the two related terms “wafer container” and “substrate container.”

Disposition

The court ordered that the ten terms identified by the parties be construed as set forth in the order. It did not decide the asserted patents’ validity challenges at this stage. The order did not determine infringement or enter judgment on the patent claims.