Using Electric 8.6: Special Layer Information

Chapter VIII: CREATING NEW ENVIRONMENTS

| ## 6: Special Layer Information |

Once the layers have been defined, the color map can be built to describe the overlappable colors and all of their combinations. Use the Edit Colors... command of the Technology menu to modify all 32 combinations of the five overlappable layers. A color mixing palette is presented in which any of the five overlappable layers can be viewed in conjunction with the other four. It is necessary that exactly five layers be given overlappable status (ten if there are associated pseudo-layers). This editing facility is the same one that is found in the Edit Colors... command which modifies the current display (see Section 4-6).

Another piece of information that can be determined, once the layers have been defined, is the design rules. Use the Edit Design Rules command of the Technology menu to see them. This command displays a text editing window for the creation or modification of design rules. Each line in the window is a single spacing rule between two layers. The first field is the distance, followed by the two layer names, all separated by spaces. For example, the line "2.5 metal metal" establishes a 2.5 lambda minimum spacing between unconnected layers of metal. To specify the spacing for connected layers, put the letter "c" before the spacing (e.g. "c1 poly diff" will force a minimum 1 lambda space between electrically connected polysilicon and diffusion layers). See Section 4-10 for more on text editing.

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