Yes — SunYin Sapphire signs an NDA before receiving drawings, CAD files, specifications or samples for sapphire PPG sensor windows and endoscope windows. Medical-device customers can share designs from the first conversation with documented confidentiality. Send your NDA template, or ask for ours, and we execute it before any file is released.

Confidentiality backed by systems

We are ISO 9001 and ISO 14001 certified (both since 2008) and work under documented quality and confidentiality procedures. Our coating workshop is ISO Class 6 cleanroom, and we are a drafting unit for China's synthetic sapphire glass industry standard and an ISO/TC114 expert member — supplier processes are auditable end to end.

Where these windows are used

• PPG sensor windows for wearables and smart rings
• Endoscope protective windows
• High-temperature and IR windows for industrial and medical equipment

Frequently asked questions

Will you sign an NDA before I share drawings?
Yes — we sign an NDA before receiving drawings, CAD files, specifications or samples.

Do you protect prototype designs?
Yes. Confidentiality applies from the first conversation through prototype and production.

What certifications support your process?
ISO 9001 + ISO 14001 (since 2008), REACH / RoHS / CP65, ISO Class 6 coating cleanroom.

https://www.sunyinsapphire.com/
SUN YIN CRYSTAL INDUSTRY COMPANY LTD