<!DOCTYPE html
  PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">

<!--
Copyright (c) 2006 UGS Corp.

All Rights Reserved.

This software and related documentation are proprietary to UGS Corp.
-->
<html>
   <head>
      <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
      <title>Defining material properties</title>
      <script language="javaScript">
        abridged="false";
        displayConditions=new Array();
      </script>
      <link type="text/css" href="../css/main_styles.css" rel="stylesheet">
   </head>
   <body class="bodydocs" onload="top.pageLoader()" bgcolor="#FFFFFF">
      <div class="title_topic3" id="xps10_pagetitle">Defining material properties</div>
      <hr noshade="true">
      <p class="para_topic">The Material Definition file is an XML file that defines materials in terms a material name and its associated material properties. These material names can be referenced in the Thermal Database file, the  <em>Default Thermal Data</em> file and on the  Default Board Settings dialog box, but they are defined only in the <em>Material Definition</em> file.
      </p>
      <p class="para_topic">The Default Thermal Data file can contain XML elements specifying material properties with XML elements identical to those in the Material Definition file. These XML elements, if present, apply only to components with no defined material, and take precedence over the default material defined in the Material Definition file.</p>
      <p class="para_topic">The Thermal Database file can also contain XML elements specifying material properties with XML elements identical to those in the Material Definition file. These material properties are applied to a specific component or components and take precedence over any material properties defined in the Material Definition file for the specific component or components, as well over any material properties specified in the Default Thermal Data file.</p>
      <table border="1" cellpadding="4" cellspacing="0" width="552" align="center">
         <colgroup span="1">
            <col span="1" width="88*">
            <col span="1" width="93*">
            <col span="1" width="115*">
         </colgroup>
         <tr>
            <th colspan="1" rowspan="1">
               <p class="para_th">XML Element</p>
            </th>
            <th colspan="1" rowspan="1">
               <p class="para_th">Description</p>
            </th>
            <th colspan="1" rowspan="1">
               <p class="para_th">Units</p>
            </th>
         </tr>
         <tr>
            <td colspan="1" rowspan="1">
               <p class="para_td">matName</p>
            </td>
            <td colspan="1" rowspan="1">
               <p class="para_td">Identifying Name</p>
            </td>
            <td colspan="1" rowspan="1">
               <p class="para_td">N.A.</p>
            </td>
         </tr>
         <tr>
            <td colspan="1" height="39" rowspan="1">
               <p class="para_td">matConductivity</p>
            </td>
            <td colspan="1" height="39" rowspan="1">
               <p class="para_td">Thermal Conductivity</p>
            </td>
            <td colspan="1" height="39" rowspan="1">
               <p class="para_td">W/m/&deg;C</p>
            </td>
         </tr>
         <tr>
            <td colspan="1" rowspan="1">
               <p class="para_td">matSpecificHeat</p>
            </td>
            <td colspan="1" rowspan="1">
               <p class="para_td">Specific Heat</p>
            </td>
            <td colspan="1" rowspan="1">
               <p class="para_td">J/kg/&deg;C</p>
            </td>
         </tr>
         <tr>
            <td colspan="1" rowspan="1">
               <p class="para_td">matMassDensity</p>
            </td>
            <td colspan="1" rowspan="1">
               <p class="para_td">Mass Density</p>
            </td>
            <td colspan="1" rowspan="1">
               <p class="para_td">kg/m 3</p>
            </td>
         </tr>
         <tr>
            <td colspan="1" rowspan="1">
               <p class="para_td">matEmissivity</p>
            </td>
            <td colspan="1" rowspan="1">
               <p class="para_td">Emissivity</p>
            </td>
            <td colspan="1" rowspan="1">
               <p class="para_td">(unitless, range 0-1)</p>
            </td>
         </tr>
      </table><br><div class="title_division"> Sample material definition file</div><pre class="indent">&lt;!--[NX PCB.xchange Version 3] --&gt;&lt;&gt; 
&lt;!--Example of Material Definition File --&gt; 
&lt;PCB.xchange Version=&quot;3&quot;&gt; 
	&lt;material&gt; 
		&lt;matName&gt; 
			Alumina 
		&lt;/matName&gt; 
		&lt;matConductivity&gt; 
			21.0 
		&lt;/matConductivity&gt; 
		&lt;matSpecificHeat&gt; 
			0.0 
		&lt;/matSpecificHeat&gt; 
		&lt;matMassDensity&gt; 
			0 
		&lt;/matMassDensity&gt; 
		&lt;matEmissivity&gt; 
			1.0 
		&lt;/matEmissivity&gt; 
	&lt;/material&gt; 
	&lt;material&gt; 
		&lt;matName&gt; 
			Plastic 
		&lt;/matName&gt; 
		&lt;matConductivity&gt; 
			3.8 
		&lt;/matConductivity&gt; 
		&lt;matSpecificHeat&gt; 
			0.0 
		&lt;/matSpecificHeat&gt; 
		&lt;matMassDensity&gt; 
			0 
		&lt;/matMassDensity&gt; 
		&lt;matEmissivity&gt; 
			1.0 
		&lt;/matEmissivity&gt; 
	&lt;/material&gt; 
&lt;/PCB.xchange&gt; </pre></body>
</html>