Two-Step Deposition of Silicon Oxide Films Using the Gas Phase Generation of Nanoparticles in the Chemical Vapor Deposition Process

Abstract

Non-classical crystallization, in which charged nanoparticles (NPs) are the building blocks of film growth, has been extensively studied in chemical vapor deposition (CVD). Here, the deposition behavior of silicon oxide films by the two-step growth process, where NPs are generated in the gas phase at high temperature and deposited as films at low temperature, was studied in the CVD process. Although we supplied SiH4, H2, and N2, the deposited film turned out to be silicon oxide, which is attributed to relatively poor vacuum. Also, silicon oxide NPs were captured on transmission electron microscopy (TEM) carbon membranes of a copper grid for 10 s under various conditions. When the quartz tube with a conical nozzle was used, the size of nanoparticles increased drastically with increasing processing time (or delay time) and porous films with a rough surface were deposited. When the quartz tube without a nozzle was used, however, the size did not increase much with increasing processing time and dense films with a smooth surface were deposited. These results suggest that the size of nanoparticles is an important parameter for the deposition of dense films for two-step growth at low temperatures.

Synthesis of Optoelectronic Nanostructures on Silicon and Gold-Coated Silicon via High-Intensity Laser Pulses at Varied Pulse Durations

“…Current production methods employed for thin films are sputtering [8,9], chemical vapor deposition (CVD) [10], plasma-enhanced CVD [11] and laser deposition [12]. These methods are performed in special closed environments, which increases the cost of production.…”

Si-Au hybrid Nanostructure Synthesis by Varying the Pulse Repetition of the ULPING Technique

“…Au is used here as it provides a better contact surface for the charges. Currently, chemical vapor deposition (CVD), sputtering, molecular beam epitaxy is widely used for nano synthesis processes [3][4][5]. However, the processes require specialized chambers and are quite expensive.…”