WORKSHOP 4 MATERIALS, LISTS AND GROUPS

WS4-2 PAT312, Workshop 4, December 2006 Copyright 2007 MSC.Software Corporation

WS4-3 PAT312, Workshop 4, December 2006 Copyright 2007 MSC.Software Corporation Model Description In this exercise you will define several groups which will contain subsets of model entities. These groups can facilitate model manipulation. You will define materials by entering the data manually based on the information provided. These materials will be applied as element properties. Lists will be used to demonstrate their utility in completing the application and verification of element properties. As you progress, carefully review your steps to ensure that you have repeated each step, if necessary, for each material, group, and property definition.

WS4-4 PAT312, Workshop 4, December 2006 Copyright 2007 MSC.Software Corporation

WS4-5 PAT312, Workshop 4, December 2006 Copyright 2007 MSC.Software Corporation Objectives In this exercise, you will define material properties and apply them as element properties on the hybrid microcircuit mesh. You will also use lists and groups as tools to more easily manipulate your model. Exercise Overview 1. Open the existing database named microcircuit.db. 2. Use Create/Isotropic/Manual Input to define the five materials used in this model. 3. Use Group/Create to define a group containing only geometry, another containing only FEM entities, and two more groups dividing the substrate FEM and the device FEM. 4. Use Properties, Create/3D/Thermal 3D Solid to apply the material properties to 4 of the 5 material regions; intentionally ignore the silicon region. 5. Use List/Create… and List/Boolean… to identify elements which have not had a material property applied. 6. Complete application of material properties using the listc contents as input. 7. Quit MSC.Patran.

WS4-6 PAT312, Workshop 4, December 2006 Copyright 2007 MSC.Software Corporation Step 1: Open an Existing Database Open an existing database. a. Click on File from the Menu Bar. b. Select Open from the drop down menu. c. Select the name microcircuit.db from the Database List box. d. Click OK. a b c d

WS4-7 PAT312, Workshop 4, December 2006 Copyright 2007 MSC.Software Corporation Step 2: Define Materials Define the five materials used in the model a. Materials. b. Create/Isotropic/ Manual Input. c. Enter the Material Name Silicon. d. Click on Input Properties… e. In the Input Options form, enter the value for Thermal Conductivity. f. Enter 1.0 for Density and Specific Heat. g. Click OK. h. Click Apply. i. Repeat the steps for the remaining four materials. The material names and corresponding values are given in the table. j. Click Apply to create each material. a b c d e f g h MaterialConductivity (W/(m*C)) Specific heat density Silicon Solder Alumina Molybdenum Kovar i

WS4-8 PAT312, Workshop 4, December 2006 Copyright 2007 MSC.Software Corporation Step 3: Define Geometry and FEM Groups. Divide the geometry and FEM into working groups. a. Select Group from the Menu Bar. b. Select Create… from the drop down menu. c. Click in the New Group Name box and enter hybrid_geom. d. Click in the Group Contents: menu and select Add All Geometry. e. Click Apply. f. Reselect Group/Create. g. Enter hybrid_fem in the New Group Name box. h. Click Group Contents: and select Add All FEM. i. Select Unpost All Other Groups. j. Apply. a b c d e g h i j

WS4-9 PAT312, Workshop 4, December 2006 Copyright 2007 MSC.Software Corporation Step 3: Define Geometry and FEM Groups Divide the geometry and FEM into working groups. a. From the Menu Bar, select Viewing/Named View Options… b. Select side_view then close. c. Select Viewing/Fit View to readjust the display. a b c

WS4-10 PAT312, Workshop 4, December 2006 Copyright 2007 MSC.Software Corporation Step 3: Define Geometry and FEM Groups Divide the geometry and FEM into working groups. a. Reselect Group/Create if necessary. b. Click in New Group Name box and enter substrate_fem. c. Click Group Contents: and select Add Entity Selection. d. Deselect Make Current, Posted, and Unpost all other groups. From the Select Menu select the FEM entity filter. e. From the next level, select the Element filter. f. In the third level, select the Hex element filter. g. Click in the Entity Selection box and drag a rectangle around the perimeter of the substrate selecting only the 3 layers of substrate hex elements. h. Apply i. Repeat previous steps to create a new group named Device_and_Solder dragging a rectangle around only the device and solder area. a b c d e f g h g Substrate layers Devices and solder d

WS4-11 PAT312, Workshop 4, December 2006 Copyright 2007 MSC.Software Corporation Step 4: Apply Element Properties Apply the material properties to 4 of the 5 material regions; intentionally ignore the silicon region. a. Select the Properties application button. b. Click Create/3D/Thermal 3D solid. c. Enter prop_kovar for Property Set Name. d. Select Input Properties… box. e. Click in the Material Name box and select Kovar from the Material Property Sets list f. Select OK. a b c d e f

WS4-12 PAT312, Workshop 4, December 2006 Copyright 2007 MSC.Software Corporation Step 4: Apply Element Properties Apply the material properties to 4 of the 5 material regions; intentionally ignore the silicon region. a. Click on Select Members box. b. From the Select menu, select the Solid element filter. c. Drag a rectangle around the lowest layer of hex elements (Region E in Fig.1) d. Click Add and then Apply. e. Repeat these steps for the next three layers of elements naming the properties prop_moly, prop_alumina, and prop_solder. Omit assigning element properties to the Silicon devices. Refer to Fig.1 for material locations. b d Figure 1 Note: We are intentionally omitting the application of a material property to some elements. However, it is not unusual in practice to inadvertently omit assigning an element property to some elements. Use lists to recover them.

WS4-13 PAT312, Workshop 4, December 2006 Copyright 2007 MSC.Software Corporation Step 5: Using Lists to Find Elements Identify elements which do not have a material property. a. Select Tools from the menu bar and click on List. b. Click on Create… from the submenu. c. FEM/Element/ Association. d. Scroll down to select Group under Association. e. Under Existing Groups, select hybrid_fem. f. Select Apply. g. Find Target List at the bottom of the Create List form, and select B. h. Set to FEM/Element/ Attribute. i. Select Material under Attribute. j. Under Existing Materials drag to select all the materials. k. Select Apply. a h c d e f g b i j k Note: Since List A contains all elements and List B contains all elements with a material attribute, subtracting List B from List A will yield List C, which will contain all the elements which do not have material attributes.

WS4-14 PAT312, Workshop 4, December 2006 Copyright 2007 MSC.Software Corporation Step 5: Using Lists to Find Elements Identify elements which do not have a material property. a. Select Tools: List from the menu bar and select Boolean… b. Choose the A-B icon. c. Click Cancel to exit Boolean List and select Cancel again to exit Create List. a b c Note: The contents of List A, List B, and List C are retained when their forms are Cancelled. MSC.Patran supplies a set of utilities collected under the name Utilities. When installed, Utilities provides a utility, Utilities/Group/Group Elements with No Properties… which accomplishes the preceding steps in three mouse clicks. Utilities will be discussed and used in later lectures and exercises.

WS4-15 PAT312, Workshop 4, December 2006 Copyright 2007 MSC.Software Corporation Step 6: Complete the Element Properties Complete the application of material properties using `listc` contents as input. a. Create/3D/Thermal 3D Solid b. Input prop_silicon for Property Set Name. c. Click on Input Properties… d. Select Silicon from Material Property Sets. e. Click OK. f. Under Select Members box, type `listc` (use reverse/back apostrophes). g. Click Add, then Apply. h. From the menu bar select Viewing: Named View Options… from the drop down menu. i. Select isometric_view, then Close. a b d g f i c e g h

WS4-16 PAT312, Workshop 4, December 2006 Copyright 2007 MSC.Software Corporation Step 6: Complete the Element Properties Complete application of material properties using listc contents as input. a. Element Properties. b. Set Action to Show. c. Under Existing Properties select Material Name. d. In Display Method select Scalar Plot. e. Under Select Groups click on hybrid_fem. f. Click Apply. b a d e f c

WS4-17 PAT312, Workshop 4, December 2006 Copyright 2007 MSC.Software Corporation Quit MSC.Patran a. Select File. b. Click Quid from the drop down menu. Step 7: Quit MSC.Patran

WS4-18 PAT312, Workshop 4, December 2006 Copyright 2007 MSC.Software Corporation

WS4-19 PAT312, Workshop 4, December 2006 Copyright 2007 MSC.Software Corporation

WS4-20 PAT312, Workshop 4, December 2006 Copyright 2007 MSC.Software Corporation