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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd"> |
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<html> |
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<head> |
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<meta name="Description" content="KLayout layout viewer and editor project page" /> |
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<meta name="Keywords" content="KLayout OASIS GDS2 viewer editor layout semiconductor mask chip design" /> |
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<meta name="abstract" content="KLayout is a free layout viewer and editor for several formats commonly used in the semiconductor industry to transfer layout data" /> |
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<meta name="URL" content="https://www.klayout.de/" /> |
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<meta name="Author" content="Matthias Koefferlein" /> |
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<title>KLayout Layout Viewer And Editor</title> |
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<body> |
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<div class="klayout-header"> |
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<div class="container mb-5"> |
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<a class="navbar-brand" href="https://www.klayout.de"><img src="https://www.klayout.de/klayout.png" srcset="https://www.klayout.de/klayout-x2.png 2x" alt="KLayout"></a> |
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About |
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<a class="dropdown-item" href="https://www.klayout.de/intro.html">KLayout Project</a> |
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<a class="ml-4" href="https://github.com/KLayout"><img src="https://www.klayout.de/GitHub-Mark-32px-white.png" border="0" title="KLayout on GitHub" alt="GitHub"/></a> |
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</div> |
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</div> |
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<div class="container"> |
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<h1>KLayout Screenshot Gallery</h1> |
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<p> |
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<table width="100%" border="0" cellpadding="0" cellspacing="5"> |
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<tr> |
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<td class="content-box"> |
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<p class="img-subscript">First Example</p> |
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<p> |
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<a href="t9_full.gif"><img src="thumb_t9_full.gif" border="0"/></a> |
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<a href="t9_inv.gif"><img src="thumb_t9_inv.gif" border="0"/></a> |
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<a href="t9_zoom.gif"><img src="thumb_t9_zoom.gif" border="0"/></a> |
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<a href="t9_descend.gif"><img src="thumb_t9_descend.gif" border="0"/></a> |
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<a href="t9_l1.gif"><img src="thumb_t9_l1.gif" border="0"/></a> |
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<a href="t9_meas.gif"><img src="thumb_t9_meas.gif" border="0"/></a> |
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<a href="t9_transp.gif"><img src="thumb_t9_transp.gif" border="0"/></a> |
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</p> |
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</td> |
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</tr> |
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<tr> |
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<td class="content-box"> |
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<p class="img-subscript">Second Example</p> |
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<p> |
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<a href="t10_full.gif"><img src="thumb_t10_full.gif" border="0"/></a> |
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<a href="t10_inv2.gif"><img src="thumb_t10_inv2.gif" border="0"/></a> |
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<a href="t10_zoom.gif"><img src="thumb_t10_zoom.gif" border="0"/></a> |
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<a href="t10_l1.gif"><img src="thumb_t10_l1.gif" border="0"/></a> |
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<a href="t9+10.gif"><img border="0" src="thumb_t9+10.gif"/></a> |
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</p> |
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</td> |
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</tr> |
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</table> |
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</p> |
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<p> |
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The following screenshots show some example layouts from a hypothetical |
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technology and a hypothetical layout (hypothetically a ring oscillator). |
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</p> |
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<p> |
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For a full view, click on the screenshot images. |
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</p> |
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<h2>First example</h2> |
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<p> |
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The first example is a simple design consisting of 20 inverter cells lined up |
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and connected with their outputs to the inputs of the next. |
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The feedback connects the output of the second-last inverter to |
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the input of the first. The last inverter is used as a buffer for |
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the output signal. |
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</p> |
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<p> |
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Since we use a odd number of inverters, there is no static state the |
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circuit can settle to. Instead, the circuit will start to oscillate |
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with a frequency determined by the delay of the inverters. |
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</p> |
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<p> |
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For practical purposes however, one would need a more elaborate design. |
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Please note, that this is a hypothetical and not a real-world design. |
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</p> |
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<p class="img-title"> |
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This screenshot shows the design in full view: |
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</p> |
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<p> |
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<a href="t9_full.gif"><img src="t9_full.gif" border="0" width="338" height="317"/></a> |
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</p> |
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<p class="img-title"> |
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This screenshot shows the single inverter cell: |
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</p> |
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<p> |
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<a href="t9_inv.gif"><img src="t9_inv.gif" border="0" width="338" height="317"/></a> |
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</p> |
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<p class="img-title"> |
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This screenshot shows a zoomed view of the full circuit: |
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</p> |
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<p> |
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<a href="t9_zoom.gif"><img src="t9_zoom.gif" border="0" width="338" height="317"/></a> |
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</p> |
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<p class="img-title"> |
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This screenshot shows the "inv" cell in the context of the "ringo" top cell. |
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The shape that "Descend" was applied to is highlighted. |
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</p> |
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<p> |
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<a href="t9_descend.gif"><img src="t9_descend.gif" border="0" width="338" height="317"/></a> |
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</p> |
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<p class="img-title"> |
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This screenshot shows the top level only. Note how the inverter |
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cells are connected: |
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</p> |
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<p> |
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<a href="t9_l1.gif"><img src="t9_l1.gif" border="0" width="338" height="317"/></a> |
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</p> |
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<p class="img-title"> |
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This screenshot shows a partial view with some measurements: |
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</p> |
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<p> |
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<a href="t9_meas.gif"><img src="t9_meas.gif" border="0" width="338" height="317"/></a> |
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</p> |
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<p class="img-title"> |
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This screenshot shows a partial view with transparent layers: |
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</p> |
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<p> |
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<a href="t9_transp.gif"><img src="t9_transp.gif" border="0" width="338" height="317"/></a> |
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</p> |
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<h2>Second example</h2> |
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<p> |
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The second example is the same circuit with a area optimized layout. |
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In this example, two inverters are made into a single cell sharing the |
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source contacts with each other. This way, one transistor spacing is |
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saved. The price to pay is the larger height required for the wiring. |
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</p> |
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<p class="img-title"> |
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This screenshot shows the design in full view: |
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</p> |
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<p> |
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<a href="t10_full.gif"><img src="t10_full.gif" border="0" width="338" height="317"/></a> |
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</p> |
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<p class="img-title"> |
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This screenshot shows the single dual-inverter cell: |
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</p> |
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<p> |
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<a href="t10_inv2.gif"><img src="t10_inv2.gif" border="0" width="338" height="317"/></a> |
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</p> |
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<p class="img-title"> |
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This screenshot shows a zoomed view of the full circuit: |
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</p> |
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<p> |
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<a href="t10_zoom.gif"><img src="t10_zoom.gif" border="0" width="338" height="317"/></a> |
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</p> |
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<p class="img-title"> |
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This screenshot shows the top level only. Note how the inverter |
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cells are connected: |
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</p> |
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<p> |
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<a href="t10_l1.gif"><img src="t10_l1.gif" border="0" width="338" height="317"/></a> |
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</p> |
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<p class="img-title"> |
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This screenshot shows both designs loaded into the same view. |
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The area advantage of the area-optimized design is clearly visible: |
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</p> |
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<p> |
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<a href="t9+10.gif"><img border="0" src="t9+10.gif" width="338" height="317"/></a> |
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</p> |
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</div> |
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</body> |
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</html> |
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