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bmlist - basic mask list file |
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The basic mask list file "bmlist.gds" as used by the programs cgi(1ICD) and cig(1ICD) contains the mask names cross reference list for gds2. Gds2 layer numbers, or combinations of a gds2 layer number and a gds2 data type, are related to mask names as used in the maskdata(4ICD) file for the process. The basic mask list file "bmlist.cmk" as used by the programs cmsk(1ICD) and xcmk(1ICD) contains the mask names cross reference list for cmk (CIRCUITMASK). Cmk mask names are related to mask names as used in the maskdata(4ICD) file for the process. |
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The bmlist file contains one line for each mask. Lines that start with a '#' character are treated as comment lines. |
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For "bmlist.gds", on each line that is not a comment line, first the standard process mask name and second the corresponding layer number for gds2 are specified. Optionally, the mask name is immediately followed (without space characters) by a colon and the word term or label. Also optionally, after the layer number, a data type or text type number for gds2 may be specified. When cgi(1ICD) converts a gds2 record to the project database, it will first try to select a mask name in the "bmlist.gds" file for which layer number and data type match with the layer number and data type of the gds2 record. If such a mask cannot be found, it will try to select a mask name for which the layer number matches with the layer number of the gds2 record and for which no data type is specified. When no data type is specified for the gds2 record, cgi(1ICD) will try to select a mask name that has a corresponding layer number and that has no data type specification. In general, when more than one line matches with the gds2 record, the mask name of the first matching line will be used. A mask name may immediately be followed by a colon and the word term. In this case the line specifies that text structures for the specified layer number are mapped to terminals on the specified mask. The optional third value then specifies the text type that is required for the text structure. When a mask name is immediately followed by a colon and the word label, a text structure for the specified layer number is mapped to a label on the specified mask. Again, the optional third value then specifies the text type that is required for the text structure. Further, the following property names, followed by a number, may be specified on a line in the "bmlist.gds" file, to specify the property numbers that are used for these properties (see cgi(1ICD)): prop_instance, prop_termlay, prop_term, prop_labellay, prop_label. When cig(1ICD) converts a layout polygon from the project database to a gds2 record, it will use the layer number and optional data type that are specified on the first line in the file "bmlist.gds" that contains the mask name of the polygon. In a similar way, terminals and labels are converted to gds2 text records with a layer number and optional text type that are specified on the first line in the file that contains the mask name followed by a colon and respectively the word term or the word label. If the latter information is not available, terminals and labels are included in the output as a boundary element with a property attached to it (see cgi(1ICD)). |
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For "bmlist.cmk", on each line that is not a comment line, first the mask name for cmk and second the corresponding standard process mask name are specified. Mask names of the used process which are not specified are automatically mapped to there own name. Thus, an empty mask list means that the mask names of the used process are used as cmk mask names. In "bmlist.cmk" each mask name (cmk or standard process) can be mapped only once to one other mask name. |
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As an example, here is the bmlist.gds file for an example N-well cmos process: # scmos_n - N-well cmos example process cpg 46 caa 43 cmf 49 cmf:term 49 cms 51 cms:term 51 cca 48 ccp 47 cva 50 cwn 42 csn 45 cog 52 cx 0 Here is different version of the bmlist.gds file for the same process. In this example, all interconnect masks have the same gds layer number but different data types or text types. In addition, labels on "cms" are specified with text structures with layer number 46 and text type 4. # scmos_n - N-well cmos example process cpg 46 1 caa 43 cmf 46 2 cmf:term 46 2 cms 46 3 cms:term 46 3 cms:label 46 4 cca 48 ccp 47 cva 50 cwn 42 csn 45 cog 52 cx 0 As another example, here is the bmlist.cmk file for an nmos process: cb ng co nc cs nb di ni in nm od nd ps np xb nx At each line we see first the mask name for cmk and second the standard process mask name. |
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ICDPATH/share/lib/process/process/bmlist.gds |
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ICDPATH/share/lib/process/process/bmlist.cmk |
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ICDPATH/share/lib/process/process/maskdata |
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Circuitmask User Manual, Philips, August 1978. |