User manual CADSOFT PCB DESIGN EAGLE 4.1

[. . . ] EAGLE EASILY APPLICABLE GRAPHICAL LAYOUT EDITOR Manual Version 4. 1 ® 2nd Edition Copyright © 2004 CadSoft All Rights Reserved This software and documentation are copyrighted by CadSoft Computer, Inc. , doing business under the tradename EAGLE. The software and documentation are licensed, not sold, and may be used or copied only in accordance with the EAGLE License Agreement accompanying the software and/or reprinted in this document. This software embodies valuable trade secrets proprietary to CadSoft Computer, Inc. All trademarks referenced in this document are the property of their respective owners. [. . . ] Micro Via Size: The drill diameter of the micro via is smaller than the value given in the Sizes tab. No vector font: The font check (Design Rules, Misc tab) recognizes text in a signal layer which is not written in EAGLE's internal vector font. If you want to generate manufacturing data with the help of the CAM Processor the texts, at least in the signal layers, ought to be written in vector font. Change the font with the help of the command CHANGE FONT or use the option Always vector font in the Layout Editor's Options/User Interface menu: If activated, the Layout Editor shows all texts in vector font. Activating the sub-option Persistent in this drawing saves the setting in the drawing file. If you send the layout file, for example, to the boardhouse you can be sure that the vector font will be displayed also at his system. 119 EAGLE Manual No real vector font: The font check (Design Rules, Misc tab) recognizes text in a signal layer which is not written in EAGLE's internal vector font although it is displayed as vector font in the Layout Editor window. This situation arises if the option Always vector font in the menu Options/User Interface is active. Restrict: A wire drawn in layer 1, Top, or 16, Bottom, or a via lies in a restricted area which is defined in layer 41 or 42, t/bRestrict. Defined by Minimum Width in the Design Rules (Sizes tab) or, if defined, by the track parameter Width of a referring net class. Wire Style: The wire style of a wire which is connected to a signal is not Continuous. Net, device and pin lists can be output by means of EXPORT or by various User Language programs. Creating Manufacturing Data Prints of the layout can be created for purposes of documentation using the PRINT command. A variety of drivers are available to create drilling data, Gerber data, plotter data and so forth. In order to save costs, it may be worth supplying the layout to the board manufacturer in the form of a multiple board. You can reproduce the layout to create a multiple board with the GROUP CUT and PASTE , commands. It should be noted that this will change the board's silk screen, since devices and signals receive new names when the layout is placed. Ensure that all the layers are displayed before using the GROUP and CUT commands. 120 From Schematic to Finished Board Any other data format can be created with the aid of ULPs (User Language programs). See the short description of ULPs in the Control Panel. 6. 4 Multilayer Boards You can develop multilayer boards with EAGLE. To do this, you use one or more inner layers (Route2 to Route15) as well as the layers Top and Bottom for the top and undersides. Before starting the routing of the layout you should be aware of the number of signal layers to use, if vias should go through all layers, or if you have, due to the complexity of the layout, to work with blind, buried or micro vias. In this case you realy ought to contact your boardhouse to inform you about the possible structure of the board and the resulting costs to be expected. Also think about how to use the inner layers: As a normal inner signal layer or as a supply layer?On this, for example, depend reasonable via lengths that have to be defined in the Layer setup. Inner Layer Inner layers are used the same way as the outer layers Top and Bottom. [. . . ] Here the MENU command runs from the first line after the comment to the last line. The pipe sign | has to be used if a command within braces {} is followed by another command. 240 Appendix E. Text Variables Text variable Meaning >NAME >VALUE >PART >GATE >SHEET Component name (eventually + gate name) 1) Component value/type 1) Component name 2) Gate name 2) Sheet number of a circuit diagram 3) >DRAWING_NAME Drawing name >LAST_DATE_TIME Time of the last modification >PLOT_DATE_TIME Time of the plot creation 1) Only for package and symbol 2) Only for symbol 3) Only for symbol or circuit diagram F. Error Messages When Loading a File Library objects with the same names. The text editor shows this message if you attempt to load an older file (BRD or SCH) that contains different versions of a library element. [. . . ]