Contract analysis

I. WITNESS BACKGROUND AND QUALIFICATIONS 1.1 Professional Background Dr. Amara Osei currently serves as Principal Engineer at Optiwave Semiconductor Corp., located at 2775 Augustine Drive, Suite 400, San Jose, California 95054. In this capacity, Dr. Osei leads the design and characterization of germanium-on-silicon photodetectors and plays a central role in the development of Optiwave's integrated silicon photonics p

II. PREPARATION NOTES AND KEY THEMES 2.1 Purpose of Deposition in Claim Construction Context This deposition is being conducted during the claim construction discovery phase of the litigation. It is critical that Dr. Osei—and defending counsel—understand the limited scope of this deposition: • The deposition is limited to claim-construction-related topics pursuant to the Court's scheduling order and the Patent Local

1. Support OWS's broader proposed claim constructions for the disputed terms in the '234 and '678 Patents. Dr. Osei's testimony should be consistent with and supportive of OWS's proposed constructions as set forth in OWS's Preliminary and Responsive Claim Construction Contentions.

2. Establish that a POSITA would understand the disputed claim terms consistent with OWS's proposed constructions. As a named inventor and highly qualified engineer in the relevant field, Dr. Osei is well-positioned to testify about how a POSITA would understand the claim terms in the context of the patent specifications and the state of the art.

3. Avoid concessions that would support Lumos's narrow constructions. This is the most critical defensive objective. BHS will attempt to elicit admissions from Dr. Osei that support Lumos's proposed narrow constructions—particularly that "continuously varying" excludes step-graded designs and that "monolithically formed" excludes all forms of heterogeneous integration.

4. Avoid statements that could create or exacerbate prosecution history estoppel issues. This concern is particularly acute for the '678 Patent, where "monolithically formed" was added by amendment during prosecution and the applicant's remarks expressly distinguished heterogeneous integration approaches. Any testimony from Dr. Osei that confirms or amplifies the scope of the prosecution disclaimer could severely dam

5. Preserve OWS's ability to use Dr. Osei as a trial witness. Nothing Dr. Osei says at this deposition should undermine her credibility or usefulness as a witness at the Markman hearing or at trial. 2.3 Anticipated Lines of Defense Questioning (Brannick Howell & Stein) Based on BHS's claim construction positions and the composition of their litigation team, we anticipate the following lines of questioning: • Examinin

III. THE '234 PATENT — DETAILED TOPIC AREAS 3.1 Overview of the Invention The '234 Patent is titled "Germanium-on-Silicon Photodetector with Graded Buffer Layer for Enhanced Responsivity." The core inventive concept is a germanium-on-silicon photodetector that incorporates a graded buffer layer between the silicon substrate and the germanium absorber layer. The graded buffer layer serves to reduce threading dislocati

IV. THE '678 PATENT — DETAILED TOPIC AREAS 4.1 Overview of the Invention The '678 Patent is titled "Multi-Channel Optical Transceiver with Integrated Wavelength-Division Multiplexing on Silicon." The core inventive concept is a multi-channel optical transceiver that integrates a WDM element (such as an arrayed waveguide grating or echelle grating) monolithically on a single silicon die, enabling higher-density optica

V. CROSS-EXAMINATION RISK AREAS AND PROTECTIVE INSTRUCTIONS This section identifies the most significant risks that may arise during cross-examination by BHS counsel and sets forth protective instructions for Dr. Osei. These instructions should be reviewed with Dr. Osei during the preparation session and reinforced immediately before the deposition. 5.1 "Continuously Varying" — Risk of Conceding Narrow Meaning Risk:

VI. SPECIFIC ANTICIPATED QUESTIONS AND SUGGESTED RESPONSES The following section identifies specific questions that we anticipate BHS counsel will ask Dr. Osei, along with suggested approaches for her responses. These are not scripted answers—Dr. Osei should testify in her own words and based on her genuine understanding. The suggested approaches are intended to guide the substance and framing of her responses to avo