<?xml version="1.0" encoding="ISO-8859-1"?><article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<front>
<journal-meta>
<journal-id>0035-001X</journal-id>
<journal-title><![CDATA[Revista mexicana de física]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. mex. fis.]]></abbrev-journal-title>
<issn>0035-001X</issn>
<publisher>
<publisher-name><![CDATA[Sociedad Mexicana de Física]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0035-001X2009000200005</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Modelo del voltaje de descarga en depósitos de ZrO X por erosión iónica reactiva]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[García-Gradilla]]></surname>
<given-names><![CDATA[V.]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Soto-Herrera]]></surname>
<given-names><![CDATA[G.]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Machorro-Mejía]]></surname>
<given-names><![CDATA[R.]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Mitrani-Abenchuchan]]></surname>
<given-names><![CDATA[E.]]></given-names>
</name>
<xref ref-type="aff" rid="A02"/>
</contrib>
</contrib-group>
<aff id="A01">
<institution><![CDATA[,Universidad Nacional Autónoma de México Centro de Nanociencias y Nanotecnología ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
</aff>
<aff id="A02">
<institution><![CDATA[,Centro de Investigación Científica y de Educación Superior de Ensenada Division de Física Aplicada ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>04</month>
<year>2009</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>04</month>
<year>2009</year>
</pub-date>
<volume>55</volume>
<numero>2</numero>
<fpage>106</fpage>
<lpage>111</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0035-001X2009000200005&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0035-001X2009000200005&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0035-001X2009000200005&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Se presenta una aplicación del modelo de Berg para el depósito de películas delgadas de ZrO X por la técnica de erosión iónica reactiva. Se propone un tratamiento alternativo de dicho modelo, adaptándolo a un punto de vista ingenieril. El modelo de Berg en su forma original considera el envenenamiento del blanco como una fracción de cobertura de la superficie del blanco, la presión de depósito, los flujos de entrada y la velocidad de bombeo. En el tratamiento alternativo que aquí se ejemplifica, todas estas cantidades -difíciles de medir en la practica - se reducen a considerar solamente variaciones en la caída de voltaje en el blanco y la impedancia del plasma, que juntos conforman el voltaje de descarga. La ventaja de este tratamiento es que puede ser usado fácilmente por un ingeniero de campo, sin conocimientos en ciencias de materiales, para controlar las propiedades de la película a depositar.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[A Berg model application for ZrO X thin film deposition by DC reactive sputtering is presented. An alternative treatment to this model is proposed, focused on an engineering point of view. Berg model involves target poisoning as a compound covering a fraction of the target surface, pressure, input flow and pumping speed. In the alternative treatment presented, all these quantities -some hard to be measured-are condensed by considering variations in the target voltage and plasma impedance, that together comprises the discharge voltage. The advantage of this handling is that can be easily used by a field engineer, without necessity of advanced knowledge in material science.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Erosión iónica reactiva]]></kwd>
<kwd lng="es"><![CDATA[voltaje de descarga]]></kwd>
<kwd lng="es"><![CDATA[películas delgadas]]></kwd>
<kwd lng="es"><![CDATA[modelo]]></kwd>
<kwd lng="en"><![CDATA[DC reactive sputtering]]></kwd>
<kwd lng="en"><![CDATA[discharge voltage]]></kwd>
<kwd lng="en"><![CDATA[thin film]]></kwd>
</kwd-group>
</article-meta>
</front><body><![CDATA[ <p align="justify"><font face="verdana" size="4">Investigaci&oacute;n</font></p>     <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>     <p align="center"><font face="verdana" size="4"><b>Modelo del voltaje de descarga en dep&oacute;sitos de ZrO<i><sub>X</sub></i> por erosi&oacute;n i&oacute;nica reactiva</b></font></p>     <p align="center"><font face="verdana" size="2">&nbsp;</font></p>     <p align="center"><font face="verdana" size="2"><b>V. Garc&iacute;a&#150;Gradilla &ordf;<sup>,b,</sup>*, G. Soto&#150;Herrera&ordf;, R. Machorro&#150;Mej&iacute;a&ordf;, E. Mitrani&#150;Abenchuchan<sup>b</sup></b></font></p>     <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>     <p align="justify"><font face="verdana" size="2"><i>&ordf; Centro de Nanociencias y Nanotecnolog&iacute;a, Universidad Nacional Aut&oacute;noma de M&eacute;xico, </i><i>Apartado Postal 2681, Ensenada B.C., 22800 M&eacute;xico.</i></font></p>     <p align="justify"><font face="verdana" size="2"><i><sup>b </sup>Division de F&iacute;sica Aplicada, Centro de Investigaci&oacute;n Cient&iacute;fica y de Educaci&oacute;n Superior de Ensenada, Km 107 Carr. Tijuana&#150;Ensenada, Ensenada B.C., 22800 M&eacute;xico, Tel: 646) 1744602; fax: (646) 1744603, </i>e&#150;mail: <a href="mailto:vgg@cnyn.unam.mx">vgg@cnyn.unam.mx</a> * </font></p>     <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>     <p align="justify"><font face="verdana" size="2">Recibido el 9 de septiembre de 2008    ]]></body>
<body><![CDATA[<br> Aceptado el 13 de marzo de 2009</font></p>     <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>     <p align="justify"><font face="verdana" size="2"><b>Resumen</b></font></p>     <p align="justify"><font face="verdana" size="2">Se presenta una aplicaci&oacute;n del modelo de Berg para el dep&oacute;sito de pel&iacute;culas delgadas de ZrO<i><sub>X</sub></i> por la t&eacute;cnica de erosi&oacute;n i&oacute;nica reactiva. Se propone un tratamiento alternativo de dicho modelo, adapt&aacute;ndolo a un punto de vista ingenieril. El modelo de Berg en su forma original considera el envenenamiento del blanco como una fracci&oacute;n de cobertura de la superficie del blanco, la presi&oacute;n de dep&oacute;sito, los flujos de entrada y la velocidad de bombeo. En el tratamiento alternativo que aqu&iacute; se ejemplifica, todas estas cantidades &#150;dif&iacute;ciles de medir en la practica &#150; se reducen a considerar solamente variaciones en la ca&iacute;da de voltaje en el blanco y la impedancia del plasma, que juntos conforman el voltaje de descarga. La ventaja de este tratamiento es que puede ser usado f&aacute;cilmente por un ingeniero de campo, sin conocimientos en ciencias de materiales, para controlar las propiedades de la pel&iacute;cula a depositar.</font></p>     <p align="justify"><font face="verdana" size="2"><b>Descriptores:</b> Erosi&oacute;n i&oacute;nica reactiva; voltaje de descarga; pel&iacute;culas delgadas; modelo.</font></p>     <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>     <p align="justify"><font face="verdana" size="2"><b>Abstract</b></font></p>     <p align="justify"><font face="verdana" size="2">A Berg model application for ZrO<i><sub>X</sub></i> thin film deposition by DC reactive <i>sputtering </i>is presented. An alternative treatment to this model is proposed, focused on an engineering point of view. Berg model involves target poisoning as a compound covering a fraction of the target surface, pressure, input flow and pumping speed. In the alternative treatment presented, all these quantities &#150;some hard to be measured&#150;are condensed by considering variations in the target voltage and plasma impedance, that together comprises the discharge voltage. The advantage of this handling is that can be easily used by a field engineer, without necessity of advanced knowledge in material science.</font></p>     <p align="justify"><font face="verdana" size="2"><b>Keywords:</b> DC reactive sputtering; discharge voltage; thin film.</font></p>     <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>     ]]></body>
<body><![CDATA[<p align="justify"><font face="verdana" size="2">PACS:  81.15.Aa;81.15.Cd;84.37.+q</font></p>     <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>     <p align="justify"><font face="verdana" size="2"><a href="/pdf/rmf/v55n2/v55n2a5.pdf" target="_blank">DESCARGAR ART&Iacute;CULO EN FORMATO PDF</a></font></p>     <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>     <p align="justify"><font face="verdana" size="2"><b>Agradecimientos</b></font></p>     <p align="justify"><font face="verdana" size="2">Los autores agradecemos a J. Palomares, C. Gonz&aacute;lez, J. Peralta, P. Casillas, E. Medina y A. Tiznado por su asistencia t&eacute;cnica. Este trabajo fue financiado con ayuda del proyecto de DGAPA IN120306.</font></p>     <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>     <p align="justify"><font face="verdana" size="2"><b>Referencias</b></font></p>     <!-- ref --><p align="justify"><font face="verdana" size="2">1. S. Berg, H&#150;O. Blom, T. Larsson y C. Nender, <i>J. Vac. Sci. Technol. A</i> <b>5</b> (1987) 202.</font>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[&#160;<a href="javascript:void(0);" onclick="javascript: window.open('/scielo.php?script=sci_nlinks&ref=8353680&pid=S0035-001X200900020000500001&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --><!-- ref --><p align="justify"><font face="verdana" size="2">2. K. Koski, J. H&ouml;ls&auml; y P. Juliet, <i>Thin Solid Films </i><b>326</b> (1998) 189.</font>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[&#160;<a href="javascript:void(0);" onclick="javascript: window.open('/scielo.php?script=sci_nlinks&ref=8353681&pid=S0035-001X200900020000500002&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --><!-- ref --><p align="justify"><font face="verdana" size="2">3. G.A. Niklasson, C.G. Granqvist y O. 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