초록 ▼

There is provided a chamber open to the outside through openings through which a solder-adhered object is passed and the chamber having a heating/melting area, a carrying mechanism for carrying the solder-adhered object into the heating/melting area, a formic-acid supplying means for supplying a for

There is provided a chamber open to the outside through openings through which a solder-adhered object is passed and the chamber having a heating/melting area, a carrying mechanism for carrying the solder-adhered object into the heating/melting area, a formic-acid supplying means for supplying a formic acid into the heating/melting area, an exhausting means for exhausting a gas from the heating/melting area and its neighboring area to create a lower pressure area in the heating/melting area as compared to the pressure of outside the chamber, heating means for heating directly or indirectly the solder-adhered object in the heating/melting area, and an air-stream suppressing means for disturbing a gas flow between the heating/melting area and the carrying areas. Accordingly, there can be provided a solder jointing system for jointing solder layers of a semiconductor device, an electronic device, or the like to the wirings or the pads, which is capable of having a high processing ability and preventing re-oxidation.

대표청구항 ▼

There is provided a chamber open to the outside through openings through which a solder-adhered object is passed and the chamber having a heating/melting area, a carrying mechanism for carrying the solder-adhered object into the heating/melting area, a formic-acid supplying means for supplying a for

There is provided a chamber open to the outside through openings through which a solder-adhered object is passed and the chamber having a heating/melting area, a carrying mechanism for carrying the solder-adhered object into the heating/melting area, a formic-acid supplying means for supplying a formic acid into the heating/melting area, an exhausting means for exhausting a gas from the heating/melting area and its neighboring area to create a lower pressure area in the heating/melting area as compared to the pressure of outside the chamber, heating means for heating directly or indirectly the solder-adhered object in the heating/melting area, and an air-stream suppressing means for disturbing a gas flow between the heating/melting area and the carrying areas. Accordingly, there can be provided a solder jointing system for jointing solder layers of a semiconductor device, an electronic device, or the like to the wirings or the pads, which is capable of having a high processing ability and preventing re-oxidation. gear wheel and a second ratchet gear wheel, wherein each of said first and second ratchet gear wheels has one-way clutch means built therein, with such an arrangement that said first ratchet gear wheel is to be locked to said output shaft element in a normal direction for rotation therewith, while being allowed to rotate in a reverse direction, and that said second ratchet gear wheel is to be locked to said output shaft element in said reverse direction, while being allowed to rotate in said normal direction; an input shaft element rotatably supported in said ratchet-type lever mechanism; a ratchet pawl member so formed from a plate material to have: a flat body portion; a first toothed pawl portion; and a second toothed pawl portion, wherein said first and second toothed pawl portions extend from said flat body portion in a spaced-apart manner, such that said second toothed pawl portion is bent from said first toothed pawl portion in an offset relation with respect to said body portion; said first and second toothed pawl portions being disposed in correspondence with the respective said first and second ratchet gear wheels; and a connecting means for connecting said ratchet pawl member to said input shaft element, said connecting means being defined in said input shaft and ratchet pawl elements. 2. The ratchet-type lever mechanism as claimed in claim 1, wherein an operating lever is firmly attached to said input shaft element.3. The ratchet-type lever mechanism as claimed in claim 1, wherein an operating lever is firmly attached to said input shaft element, and wherein a biasing means is provided to normally bias both said ratchet pawl member and said operating lever in a direction to a neutral point where said first and second toothed pawl portions are both out of engagement with the respective said first and second ratchet gear wheels.4. The ratchet-type lever mechanism as claimed in claim 1, wherein said connecting means comprises: an uneven portion defined in said input shaft; and an unevenly shaped hole formed in said ratchet pawl member, and wherein said ratchet pawl member is connected to said input shaft by engaging said unevenly shaped hole of the ratchet pawl member about said uneven portion of the input shaft element.5. The ratchet-type lever mechanism according to claim 4, wherein said uneven portion and said unevenly shaped hole are formed in a splined or serrated manner.6. The ratchet-type lever mechanism according to claim 4, wherein said uneven portion and said unevenly shaped hole are formed in a non-circular manner.7. The ratchet-type lever mechanism as claimed in claim 1, wherein an operating lever is firmly attached to said input shaft element, and wherein said connecting means includes a two-point connecting means for not only connecting said operating lever to said input shaft element at one point, but also connecting said operating lever to said ratchet pawl member at another point.8. A ratchet-type lever mechanism comprising: a housing means; an output shaft element rotatably provided in said housing means; a ratchet gear wheel means rotatably provided in said housing means; said ratchet gear wheel means including a first ratchet gear wheel and a second ratchet gear wheel, wherein each of said first and second ratchet gear wheels has one-way clutch means built therein, with such an arrangement that said first ratchet gear wheel is to be locked to said output shaft element in a normal direction for rotation therewith, while being allowed to rotate in a reverse direction, and that said second ratchet gear wheel is to be locked to said output shaft element in said reverse direction, while being allowed to rotate in said normal direction; an input shaft element rotatably supported in said housing means; a ratchet pawl member so formed from a plate material to have: a flat body portion; a first toothed pawl portion; and a second toothed pawl portion, wherein said first and second toothed pawl portions extend from said flat body portion in a spaced-apart manner, such that said second toothed pawl portion is bent from said first toothed pawl portion in an offset relation with respect to said flat body portion; said first and second toothed pawl portions being disposed in correspondence with the respective said first and second ratchet gear wheels; and a connecting means for connecting said ratchet pawl member to said input shaft element, said connecting means being defined in said input shaft element and said flat body portion of said ratchet pawl member. 9. The ratchet-type lever mechanism as claimed in claim 8, wherein said connecting means comprises: an uneven portion defined in said input shaft element; and an unevenly shaped hole formed in said ratchet pawl member, and wherein said ratchet pawl member is connected to said input shaft element by engaging said unevenly shaped hole of the ratchet pawl member about said uneven portion of the input shaft element.10. The ratchet-type lever mechanism as claimed in claim 8, which further comprises: a restriction means for restricting rotation of said ratchet pawl member, said restricting means including: a restriction element so formed from a plate material as to have a flat body portion and at least one lug extending from said flat body portion; and a pair of stopper pieces formed in said housing means, with such an arrangement that rotation of said input shaft element brings one of said at least one lug of said restriction element to contact with a selected one of said pair of stopper pieces associated with said restriction means, thereby restricting rotation range of said first and second toothed pawl portions with respect to said first and second toothed gear wheels.11. The ratchet-type lever mechanism as claimed in claim 8, wherein an operating lever is firmly attached to said input shaft element, wherein a biasing means is provided to normally bias both said ratchet pawl member and said operating lever in a direction to a neutral point where said first and second toothed pawl portions are both out of engagement with the respective said first and second ratchet gear wheels, wherein said biasing means comprises a circular spring having a pair of ends, said circular spring being attached about said connecting means, wherein a restriction means is provided for restricting rotation of said rachet pawl member, said restricting means including: a restriction element so formed from a plate material as to have a flat body portion and at least three lugs extending from said flat body portion and a pair of stopper pieces formed in said housing means, with such an arrangement that rotation of said input shaft element brings one of said at least three lugs of said restriction element to contact with one of said pair of stopper pieces associated with said restriction means, thereby restricting rotation range of said first and second toothed pawl portions with respect to said first and second toothed ratchet gear wheels, and wherein said two ends of said circular spring are respectively contacted with another two of said at least three lugs of said restriction elements.12. The ratchet-type lever mechanism as claimed in claim 8, wherein the ratchet-type lever mechanism includes an operating lever disposed outside said housing means, wherein said connecting means includes a two-point connecting means for not only connecting said operating lever to said input shaft element at one point, but also connecting said operating lever to said ratchet pawl member at another point, wherein said two-point connecting means comprises: a first connecting means for connecting said operating lever to said input shaft element, said first connecting means comprising: a threaded hole portion formed in said input shaft element; a first hole formed in said operating lever; and a securing screw which is inserted through said first hole and further threadedly engaged in said threaded