Work

Noninvasive Profilometry of Sealed Otto Chip Devices by Scanning Optical Reflectometry

Year: 2025

Type: article

Abstract: Profilometry carried out on a surface having micro and nanoscale features is an important diagnosis step, in both the electronics and the photonics industry, as well as in research. Nonetheless, few techniques are available for the structural characterization of buried devices. This work evaluates the suitability of an automated reflectometer to perform scanning optical reflectometry (SOR) analysis of quartz sealed plasmonic devices capable of supporting the surface plasmon resonance (SPR) effect in the Otto configuration. The SOR technique was able to fully characterize the devices for quality of sealing between different materials, as well as to map optical parameters of the metallic films and identification of substrate wear, in an automated and non invasive way. Devices with 9cm2and 1.4cm2of area are characterized, and the minimum gap between layers measured was 0.69μm. A defective device was also identified through SOR and its defects were confirmed by reflectance microscopy.

Source: IEEE Transactions on Instrumentation and Measurement

DOI: 10.1109/tim.2025.3590830

Authors: Gabriel de Freitas Fernandes, Jung-Mu Kim, Ignacio Llamas-Garro, Gustavo Oliveira Cavalcanti, Joaquim Ferreira Martins-Filho, Eduardo Fontana

Institutions: Universidade Federal de Pernambuco, Jeonbuk National University, Centre Tecnologic de Telecomunicacions de Catalunya, Universidade de Pernambuco

Language: English

Topic: Surface Roughness and Optical Measurements

Subfield: Computational Mechanics

Field: Engineering

Domain: Physical Sciences

Open Access status: hybrid

Estimated APC paid: $2,645

Funder: Coordenação de Aperfeiçoamento de Pessoal de Nível Superior