This report presents a device essentials plus (DEP) of the STMicroelectronics 55G0AB 0.4 MP resolution 2.6 μm pixel pitch IR camera, extracted from the Microsoft Surface Pro 8. The Surface Pro 8 features an STMicroelectronics IR camera in use in its Windows Hello Face Authentication biometric system. The sensor employs a stacked configuration pairing a sensor layer with companion ISP.
The DEP deliverable builds on the content generated in a device essentials (DEF) project. The purpose of the DEP is to extend coverage of chip analysis beyond the SEM-based imaging used for DEF projects, and to expand the analyst commentary. A DEP contains interpreted results from transmission electron microscopy (TEM), TEM-based energy dispersive X-ray spectroscopy (TEM-EDS), TEM-based electron energy loss spectroscopy (TEM-EELS), secondary ion mass spectroscopy (SIMS) and scanning capacitance microscopy (SCM) analyses (the DEP scope is target device dependent). The DEP report includes the following:

• Summary of salient features of the device
• TEM images of pre-metal dielectrics (PMD), deep trench isolation (DTI), back layers, microlenses, and microlens coating
• TEM-EDS spectra of dielectrics, metals, DTI, back dielectrics, color filters, microlenses, and microlens coating
• Scanning microwave impedance microscopy (sMIM) of the pixel photocathode (along horizontal and vertical planes of cross-section) and periphery
• SIMS analysis of the CMOS image sensor (CIS) die pixel array and periphery