The Department of Defense (DoD) is seeking proposals for the topic "Manufacturing of Nitrogen Vacant (NV) Diamond Substrates for Quantum Sensors" as part of the SBIR 23.3 BAA. The objective of this program is to scale-up growth manufacturing techniques to produce high-quality diamond substrates for quantum sensors. The desired properties include a crystal size of at least 5x5x0.5 millimeters, strain less than 0.5 parts per million, nitrogen doping level less than 5 parts per billion, and a crystal warp less than 5 microns. The goal is to achieve a yield of 6 substrates per reactor per week. The technology has applications in quantum systems and sensing, and the commercial supply of consistent and controllable diamond materials is in high demand. The Phase I award is not required, and the offeror should demonstrate accomplishment of a "Phase I-type" effort in the Direct to Phase II proposal. The Phase II effort will focus on scaling up the growth process, achieving manufacturing readiness levels, and demonstrating vertical integration and the regeneration of new master seed crystals. The Phase III applications involve commercialization and transitioning the technology for use in vector magnetometers. The solicitation is closed, and more information can be found on the DoD SBIR website.