Abstract: A semiconductor device includes a first active pattern including a first lower pattern and first sheet patterns; a second active pattern including a second lower pattern and second sheet patterns, a height of the second lower pattern being smaller than a height of the first lower pattern; a first gate structure on the first lower pattern; a second gate structure on the second lower pattern; a first source/drain pattern on the first lower pattern and connected to the first sheet patterns; and a second source/drain pattern on the second lower pattern and connected to the second sheet patterns, wherein a width of an upper surface of the first lower pattern is different from a width of an upper surface of the second lower pattern, and wherein a number of first sheet patterns is different from a number of second sheet patterns.

Abstract: A reciprocating type driving mechanism for use for a bicycle, baby carriage and wheel chair, which can provide convenience in driving to the user and which comprises: a front and rear wheels W1 and W2; a gear box B; a driving and driven gears 20 and 30 and a side gear 31 formed integrally with the driven gear 30; driving members 40 each comprising three links 41, 42 and 43; a pinion 50 adapted for alternate operation of the driving members 40; a head gear 60 in meshed connection with the side gear 31; an intermediate gear 70 positioned below the head gear 60; a relaying gear 81 in meshed connection with the intermediate gear 70; an output gear 82 provided at the bottom part of the driving axle 80 for transmitting the torque; and a hub gear 90 in meshed connection with the output gear 82 (FIG. 1).

Abstract: The present invention relates to a reciprocating type driving mechanism for use for a bicycle, baby carriage and wheel chair, which can provide convenience in driving to the user and which comprises: a front and rear wheels W1 and W2 provided in the front and rear parts of a car body 10; a gear box B provided on the head pipe 11 of the car body 10; a driving and driven gears 20 and 30 in meshed engagement and a side gear 31 formed integrally with the driven gear 30, those gears being built in the gear box B; driving members 40 each comprising three links 41, 42 and 43 for rotating the driving gear 20 only in the advancing direction through unidirectional clutches C1, the driving members being provided on the both sides of the car body 10; a pinion 50 in meshed connection with the racks 42a formed on the second links 42 and adapted for alternate operation of the driving members 40; a head gear 60 in meshed connection with the side gear 31 and provided on a lower part of the head pipe 11 through a bearing 61; a