HD Silicon Solutions LLC v. Microchip Technology Inc.

Background

HD Silicon Solutions LLC sued Microchip Technology Inc. over seven patents. Four patents—the ’002, ’299, ’619, and ’033 patents—were the subject of instituted inter partes reviews, which are proceedings addressing patent validity. The ’731 and ’404 patents were not subject to instituted review because review was denied for those patents.

The case began in the Western District of Texas and was transferred to the Northern District of California on October 25, 2021. Before the transfer, the parties had exchanged some preliminary infringement and invalidity contentions and submitted claim-construction briefs. In this Court, however, the parties had not engaged in discovery, exchanged the required patent contentions, or attended a claim-construction hearing. The Court had also set no deadlines or trial date.

After review was instituted for the four patents, the parties agreed to stay proceedings concerning those patents. Microchip then moved to stay the entire case. HD Silicon opposed a complete stay and agreed only to a partial stay.

Analysis

The Court applied three factors used to decide whether to stay a patent case pending inter partes review: the stage of the litigation, whether a stay would simplify the issues, and whether the stay would unfairly harm or create a tactical disadvantage for the opposing party.

First, the Court found that the litigation was in its early stages. There had been limited or no factual discovery, no expert discovery, no dispositive motions, and no trial setting. Because substantial work remained, this factor favored staying the entire case.

Second, the Court found that a complete stay could simplify the case and conserve resources. Microchip argued that the patents shared an inventor or ownership history and that discovery would involve some of the same third-party sources and business operations. HD Silicon argued that the patents involved different claims and accused devices. The Court nevertheless found enough potential overlap in discovery to justify staying the entire case, even if there were no common claims or accused devices.

Third, the Court found that a complete stay would not unduly prejudice HD Silicon. The parties expected the last decision on the instituted reviews by April 2023. HD Silicon argued that the remaining patents were expired and more vulnerable to delay. Microchip argued that HD Silicon was a non-practicing entity and that monetary damages could compensate for harm from delay. The Court concluded that a general concern about delaying older patents did not weigh against a stay.

Disposition

The Court GRANTS Microchip’s motion to stay the litigation for all patents at issue, rather than limiting the stay to the four patents undergoing inter partes review. The Court further orders the parties to file joint status reports about the review proceedings every 120 days or within 10 days after the proceedings conclude, whichever occurs first.