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Digitale Medien

Synthesis and characterization of a naphthoquinonediazide positive photoresist derived from bis(hydroxymethyl)phenol (1995)

Liu, Jui-Hsiang ; Liu, Huang-Tsai ; Tsai, Fu-Ren

Weinheim : Wiley-Blackwell

Angewandte Makromolekulare Chemie 229 (1995), S. 63-72

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ISSN: 0003-3146

Schlagwort(e): Chemistry ; Polymer and Materials Science

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Chemie und Pharmazie , Physik

Beschreibung / Inhaltsverzeichnis: Eine neuartige lichtempfindliche Naphthochinondiazid-Verbindung (NQD) wurde aus 2,6-Bis(hydroxymethyl)-3,4-dimethylphenol und Toluoldiisocyanat synthetisiert und mit IR-, NMR- und Elementaranalyse identifiziert. Die Bleicheigenschaften unter Lichteinwirkung wurden mit UV-Spektrophotometrie bestimmt. Die Anwendung von NQD in der Photolithographie als positiver Photoresist sowie einer wäßrigen Lösung von NQD, Novolak, Cellosolve-Acetat und DMF als lichtempfindliches Material wurde untersucht. Das hergestellte NQD erwies sich als effektive Komponente in positiven Photoresists. Die optimalen Bedingungen der UV-Dosis, Schichtdicke und Resistzusammensetzung wurden abgeschätzt. Die Auflösung des positiven Photoresists wurde durch Rasterelektronenmikroskopie bestimmt. Außerdem wurde der Einfluß von UV-Dosis und -Wellenlänge, Einwirkungsdauer und Entwicklungszeit auf die Empfindlichkeit und die Auflösung des Photoresists untersucht.

Notizen: A new photosensitive naphthoquinonediazide (NQD) was synthesized from 2,6-bis-(hydroxymethyl)-3,4-dimethylphenol and toluene diisocyante. NQD was identified by using IR, NMR and elemental analyses. Photobleachable characteristics were evaluated by UV spectrophotometry. Applications of the NQD on the photolithography as a positive working photoresist were investigated. The aqueous solution of NQD, novolak, cellosolve acetate, and DMF was used as a photosensitive material. It was found that NQD synthesized in this investigation can be used as an effective component in a positive photoresist. Optimal conditions of the UV dose, coating thickness, and development of the resist system were estimated. Resolution of the positive resist was evaluated by SEM technique. Effects of UV dose, exposure time, development time, and exposure UV wave length on the sensitivity and resolution of the photoresist were investigated.

Zusätzliches Material: 6 Ill.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/apmc.1995.052290104

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Digitale Medien

Synthesis and characteristics of chiral polymers with camphanediolSystematic name: 2,3-Bornandiol. moieties (1995)

Liu, Jui-Hsiang ; Tsai, Fu-Ren ; Lai, Yuh-Chung

Weinheim : Wiley-Blackwell

Angewandte Makromolekulare Chemie 231 (1995), S. 35-45

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ISSN: 0003-3146

Schlagwort(e): Chemistry ; Polymer and Materials Science

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Chemie und Pharmazie , Physik

Beschreibung / Inhaltsverzeichnis: Optisch aktives exo,exo-2,3-Camphandiol (CPO) wurde aus (+)-Campher synthetisiert und mit Toluol-2,4-diisocyanat (TDI) und Isophorondiisocyanat (IPDI) zu den entsprechenden chiralen Polymeren Poly(CPO-co-TDI) und Poly(CPO-co-IPDI) polymerisiert. Der Einfluß von Lösungsmitteln, Reaktionszeit und -temperatur auf die Polymerisation wurde untersucht. Um die Konformation der chiralen Polymeren zu bestimmen, wurden zwei den Polymeren ähnliche Modellverbindungen hergestellt: exo,exo-2,3-Bornylen-N,N′-diphenyldicarbamat und exo,exo-2,3-Bornylen-N,N′-dipropyldicarbamat. Die chiroptischen Eigenschaften und die Stereochemie der chiralen Polymeren wurden mittels Zirkulardichroismus-Spektrometrie untersucht. Der Einfluß von Temperatur und Lösungsmitteln auf die spezifische Rotation der chiralen Polymeren wurde ebenfalls ermittelt. Die Ergebnisse weisen darauf hin, daß die chiralen Polymeren nicht in einer einhändigen Helixkonformation auftreten.

Notizen: Optically active exo,exo-2,3-camphanediol (CPO) was synthesized from (+)-camphor. The chiral polymers poly(CPO-co-TDI) and poly(CPO-co-IPDI) were synthesized by step polymerization of chiral compound CPO with toluene-2,4-diisocyanate (TDI) and isophorone diisocyanate (IPDI). Effects of solvents, reaction time and temperature on the polymerization were investigated. To investigate the stereo structure of the chiral polymers, two kinds of model compounds, exo-exo-2,3-bornylene N,N′-diphenyldicarbamate and exo,exo-2,3-bornylene N,N′-dipropyldicarbamate, related to the prepared polymers were synthesized. Chiroptical characteristics and stereo structures of the chiral polymers were investigated by using a circular dichroic spectrometer. Effects of temperature and solvents on the specific rotation of the chiral polymers were evaluated. The results obtained in this investigation suggest that the synthesized chiral polymers have no one-handed helix conformation.

Zusätzliches Material: 4 Ill.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/apmc.1995.052310104

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Synthesis of chiral polymers having camphanediol moieties and their applications on the optical resolution of some racemates (1995)

Liu, Jui-Hsiang ; Tsai, Fu-Ren ; Lai, Yuh-Chung

New York, NY [u.a.] : Wiley-Blackwell

Journal of Applied Polymer Science 58 (1995), S. 1713-1720

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ISSN: 0021-8995

Schlagwort(e): Chemistry ; Polymer and Materials Science

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Chemie und Pharmazie , Maschinenbau , Physik

Notizen: Optically active exo-exo-2,3-camphanediol (CPO) (3) was synthesized from (+)-camphor. Chiral polymers poly(CPO-co-TDI) (6) and poly(CPO-co-IPDI) (7) were synthesized by the step polymerization of chiral compound CPO (3) with toluene-2,4-diisocyanate (TDI) and isophorone diisocyanate (IPDI). To investigate the stereo structure of the chiral polymers, two kinds of model compounds, exo-exo-2,3-di[(phenylamido)oxy]camphane (4) and exo-exo-2,3-di[(propylamido)oxy]camphane (5), related to polymers (6) and (7) were synthesized. Chiroptical characteristics and stereo structures of the chiral polymers were investigated using a circular dichroic spectrometer. The results obtained in this investigation suggest that the chiral polymers (6) and (7) have no one-handed helix conformation. The optical resolution ability as chiral adsorbent for HPLC of the chiral polymers was investigated. It was found that chiral polymers (6) and (7) are effective for the optical resolution of some racemates. © 1995 John Wiley & Sons, Inc.

Zusätzliches Material: 4 Ill.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/app.1995.070581008

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Synthesis and polymerization of 3-oxobornyl methacrylate (1996)

Liu, Jui-Hsiang ; Tsai, Fu-Ren ; Wang, Jenn-Hwa

New York, NY [u.a.] : Wiley-Blackwell

Journal of Applied Polymer Science 61 (1996), S. 1211-1216

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ISSN: 0021-8995

Schlagwort(e): Chemistry ; Polymer and Materials Science

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Chemie und Pharmazie , Maschinenbau , Physik

Notizen: The new chiral monomer 3-oxobornyl methacrylate (OBMA) was synthesized from (+)-camphor. Homopolymerization of OBMA and copolymerization of OBMA with styrene were carried out in benzene in the presence of AIBN. The effect of concentration, solvent, temperature, and reaction time on the copolymerization were investigated. It was found that the absolute value of the specific rotation of poly(OBMA-co-St) increased by increasing the OBMA unit content. A small deviation from linearity was observed, which suggests that asymmetry is not introduced into the copolymer main chain. Temperature and solvent effects on the specific rotation of the chiral polymers were investigated. The results suggest that chiral polymers contain no helix conformation. Inspecting the spectra of optical rotatory dispersion and circular dichroism, we found that the chiral polymers exhibit a strong negative Cotton Effect around 310 nm. © 1996 John Wiley & Sons, Inc.

Zusätzliches Material: 5 Ill.

Materialart: Digitale Medien

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Optical resolution ability of chiral polymers having camphanediol moieties (1996)

Liu, Jui-Hsiang ; Tsai, Fu-Ren

New York, NY [u.a.] : Wiley-Blackwell

Polymer International 40 (1996), S. 219-225

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ISSN: 0959-8103

Schlagwort(e): camphone diol ; chiral polymers ; circular dichroic spectrometry ; optical resolution ability ; Chemistry ; Polymer and Materials Science

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Chemie und Pharmazie , Maschinenbau , Physik

Notizen: Optically active exo-exo-2,3-camphanediol (CPO) (3) was synthesized from (+)-camphor. Chiral polymers poly(CPO-co-TDI) (6) and poly(CPO-co-IPDI) (7) were synthesized by the step polymerization of chiral compound CPO (3) with toluene-2,4-diisocyanate (TDI) and isophorone diisocyanate (IPDI). To investigate the stereo structure of the chiral polymers, two kinds of model compound exo-exo-2,3-di[(phenylamido)oxy]camphane (4) and exo-exo-2,3-di[(propylamido)oxy]camphane (5) related to polymers (6) and (7) were synthesized. Chiroptical characteristics and stereo structures of the chiral polymers were investigated by using circular dichroic spectrometry. The results obtained in this investigation suggest that the chiral polymers (6) and (7) do not have onehanded helix conformation. Optical resolution ability as chiral adsorbent for high-performance liquid chromatography of the chiral polymers was investigated. It was found that chiral polymers (6) and (7) are effective for the optical resolution of some racemates.

Zusätzliches Material: 4 Ill.

Materialart: Digitale Medien

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