End-point detection and etch-rate measurement during reactive-ion etching using fluorescent polymer films

Author(s):  
Paul Kolodner
2001 ◽  
Vol 40 (Part 1, No. 3A) ◽  
pp. 1457-1462 ◽  
Author(s):  
Masaaki Kanoh ◽  
Masashi Yamage ◽  
Hiroyuki Takada

1984 ◽  
Vol 131 (1) ◽  
pp. 214-215 ◽  
Author(s):  
Kwang O. Park ◽  
Fredrick C. Rock

1993 ◽  
Vol 324 ◽  
Author(s):  
Loretita M. Shirey ◽  
Kelly W. Foster ◽  
William Chu ◽  
John Kosakowski ◽  
Kee Woo Rhee ◽  
...  

AbstractReactive ion etching of features down to 100 nm in linewidth in tungsten has been studied using an SF6 based chemistry. The studies were carried out in a PlasmaTherm 500 etcher operated at low pressure (2 mTorr) and power (100 mWatts/cm2). Key processing parameters have been identified to achieve the resolution and aspect ratio required for high contrast x-ray masks. The critical parameters include sample temperature, gas dilution and end point detection. However, even with all of these parameters optimized, additional sidewall passivation is required to obtain the necessary 6.5:1 aspect ratio. A novel method of achieving such passivation based on an intermittent etching process is described.


Talanta ◽  
2021 ◽  
Vol 224 ◽  
pp. 121735
Author(s):  
Claudio Avila ◽  
Christos Mantzaridis ◽  
Joan Ferré ◽  
Rodrigo Rocha de Oliveira ◽  
Uula Kantojärvi ◽  
...  

1979 ◽  
Vol 25 (6) ◽  
pp. 973-975 ◽  
Author(s):  
T Chard ◽  
A Sykes

Abstract We describe an immunoassay for human choriomammo-tropin by use of the fluorescein-labeled hormone (of human origin). The technique is generally similar to the radioimmunoassay for this material, but has the advantage of stability of tracer and avoidance of radiation hazard. However, the procedure requires approximately 50-fold more tracer than does the radioimmunoassay, and this would be a disadvantage with materials for which supplies of purified antigen are scarce. Furthermore, both within-assay variation (3.9%) and between-assay variation (7.8--7.9%) were less satisfactory than that of radioimmunoassay (1.5% and 2.2--3%, respectively). This is almost certainly the result of imprecision of end-point detection and could probably be corrected by further attention to equipment design.


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