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Thermal effects in photomask engineering and nano-thermometry

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Thermal effects in photomask engineering and nano-thermometry
作者:	Chu, Dachen.
面頁冊數:	108 p.
附註:	Adviser: R. Fabian W. Pease.
附註:	Source: Dissertation Abstracts International, Volume: 65-04, Section: B, page: 1917.
Contained By:	Dissertation Abstracts International65-04B.
標題:	Physics, Condensed Matter.
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3128632
ISBN:	0496758942

Thermal effects in photomask engineering and nano-thermometry
Chu, Dachen.

Thermal effects in photomask engineering and nano-thermometry [electronic resource] - 108 p.

Adviser: R. Fabian W. Pease.

Thesis (Ph.D.)--Stanford University, 2004.

A Green's function approach has been developed to calculate four-dimensional temperature profiles in complex structures such as the multi-layer work-pieces being exposed in EBL. The model is being used to characterize different ebeam writing strategies to find the optimum.

ISBN: 0496758942Subjects--Topical Terms:

226939
Physics, Condensed Matter.

Thermal effects in photomask engineering and nano-thermometry
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502 $a Thesis (Ph.D.)--Stanford University, 2004.
520 # $a A Green's function approach has been developed to calculate four-dimensional temperature profiles in complex structures such as the multi-layer work-pieces being exposed in EBL. The model is being used to characterize different ebeam writing strategies to find the optimum.
520 # $a Electron Beam Lithography (EBL) in photomask fabrication results in heating of the resist films. The local heating can change the chemical properties of resist, leading to placement errors. The heating induced error has been believed to be increasingly significant as the transistor minimum feature size approaches the sub 100 nm region.
520 # $a Gold/nickel thin film thermocouples with minimum junction area of 100nm by 100nm were fabricated and calibrated. These thermocouple demonstrated a 400ns response time when heated by a 10ns laser pulse. Using these nano thermocouples, transient resist heating temperature profiles were for the first time measured at room temperature. Experimental results showed a good agreement with the Green's function model. We also observed a tradeoff in the scaling of thermocouple sensors. The smaller thermocouples may provide higher spatial and temporal resolutions but have poorer temperature resolution.
520 # $a In conclusion, we both modeled and measured the resist heating in EBL. In short exposure time (&sim;1us or less) the resist heating is nearly adiabatic, while in longer time the heating is dominated by substrate. Nano scale metallic thermocouples were explored and tradeoff was observed in dimension scaling.
520 # $a To provide the parameters for the model, two independent techniques have been employed: a thin film electrode method and a laser thermal-reflectance method. Unlike earlier results from polyimide films, no appreciable anisotropy was observed in thermal conductivities for the polymeric resists tested.
590 $a School code: 0212.
650 # 0 $a Physics, Condensed Matter. $3 226939
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