Semiconductor integrated circuit device

A semiconductor integrated circuit device comprising:

• a first conductivity type semiconductor substrate;
• a second conductivity type semiconductor region formed in one part of said first conductivity type semiconductor substrate;
• a plurality of first conductivity type active regions formed in said second conductivity type semiconductor region in a corresponding plurality of rows;
• a plurality of first gates which are arranged and formed between the adjacent ones of said first conductivity type active regions through an insulating film, and wherein a plurality of first conductivity type transistors are each formed by one of said gates and said first conductivity type active regions flanked on both sides of said each one of said first gates;
• a plurality of second conductivity type active regions formed on said semiconductor substrate in correspondence to said plurality of first conductivity type active regions;
• a first plurality of second gates which are formed between adjacent ones of said second conductivity type active regions and in correspondence to said first gates, wherein a first plurality of second conductivity type transistors are formed by one of said second gates and said second conductivity type active regions flanked on both sides of each one of said second gates wherein a second plurality of said first plurality of second conductivity type transistors are each paired with one of said first conductivity type transistors;
• a plurality of first transmission gates each being constructed with the first conductivity type transistor of one pair of the transistors out of each two pair of said paired transistors of the first and second conductivity type transistor pairs and the second conductivity type transistor of the other pair of transistors, the active regions in the respective transistors being mutually connected and inputs of mutually opposite mode being supplied to the respective gates thereof;
• and
• a plurality of second transmission gates each being constructed with the first conductivity type transistor of the other transistor pair and second conductivity type transistor of the one transistor pair, the active regions of the respective transistors being mutually connected and inputs of mutually opposite mode being supplied to the respective gates thereof;
• wherein one of the active regions in the first conductivity type transistor constituting said first transmission gate and one of the active regions in the first conductivity type transistor constituting said second transmission gate are constructed with one and the same active region, and one of the active regions in the second conductivity type transistor constituting said first transmission gate and one of the active regions in the second conductivity type transistor constituting said second transmission gate are constructed with one and the same active region.