Lead frame having integral terminal tabs
First Claim
1. A continuous strip of stamped and formed lead frames, each lead frame of said strip being intended to receive, and establish electrical connections to, a chip having oppositely directed faces and having two contact areas on one of said faces and having one contact area on the other face, said strip comprising:
- a continuous carrier strip means, said lead frames being integral with said carrier strip means at spaced-apart intervals,each of said lead frames having a chip receiving zone which is spaced from said carrier strip means, each of said lead frames comprising first, second, and third arms, said arms being integral with said carrier strip means,each of said arms having an integral terminal portion, each of said terminal portions being generally rectangular and comprising a plurality of thicknesses of sheet metal and being dimensioned to be mated with a complementary terminal device, said terminal portions radiating from said chip receiving zone of each lead frame,said second arm of each lead frame having integral chip supporting surface portions in said chip receiving zone, said first and third arms having contact members which extend at least partially across said chip supporting surface portions, said contact members of said first and third arms having contact tip portions for establishing electrical contact with said two contact areas on said one face of a chip whereby,upon placement of a chip on said chip supporting surface of one of said lead frames with said other face of said chip against said chip supporting surface and with said contact members extending across said one face of said chip, said chip supporting surface will be in electrical contact with said one contact area on said other face of said chip, and said contact tip portions of said contact members will be in electrical contact with said two contact areas on said one face of said chip, and upon severing said one lead frame from said strip and bending said terminal portions away from the plane of said strip in a common direction, said terminal portions will surround said chip receiving zone and external conductors can be connected to said chip by mating terminals in said external conductors with said terminal portions of said arms.
0 Assignments
0 Petitions
Accused Products
Abstract
A continuous strip of stamped and formed lead frames for a semi-conductor chip comprises a continuous carrier strip having three laterally extending arms integral therewith. One of the arms has a chip receiving surface to which the chip is soldered. The other arms have reversely bent end portions which extend over the chip receiving surface and which are intended to be connected to contact areas on the upwardly facing surface of the chip. Each of the arms has an integral terminal member extending therefrom in the plane of the strip and these terminal members are later bent upwardly relative to the plane of the strip so that they surround the chip receiving surface. The terminal members may comprise rectangular tabs formed by folding the stock metal of the strip and dimensioned to receive complementary contact terminals on the ends of wires thereby to connect the contact areas of the chip to external circuitry.
-
Citations
13 Claims
-
1. A continuous strip of stamped and formed lead frames, each lead frame of said strip being intended to receive, and establish electrical connections to, a chip having oppositely directed faces and having two contact areas on one of said faces and having one contact area on the other face, said strip comprising:
-
a continuous carrier strip means, said lead frames being integral with said carrier strip means at spaced-apart intervals, each of said lead frames having a chip receiving zone which is spaced from said carrier strip means, each of said lead frames comprising first, second, and third arms, said arms being integral with said carrier strip means, each of said arms having an integral terminal portion, each of said terminal portions being generally rectangular and comprising a plurality of thicknesses of sheet metal and being dimensioned to be mated with a complementary terminal device, said terminal portions radiating from said chip receiving zone of each lead frame, said second arm of each lead frame having integral chip supporting surface portions in said chip receiving zone, said first and third arms having contact members which extend at least partially across said chip supporting surface portions, said contact members of said first and third arms having contact tip portions for establishing electrical contact with said two contact areas on said one face of a chip whereby, upon placement of a chip on said chip supporting surface of one of said lead frames with said other face of said chip against said chip supporting surface and with said contact members extending across said one face of said chip, said chip supporting surface will be in electrical contact with said one contact area on said other face of said chip, and said contact tip portions of said contact members will be in electrical contact with said two contact areas on said one face of said chip, and upon severing said one lead frame from said strip and bending said terminal portions away from the plane of said strip in a common direction, said terminal portions will surround said chip receiving zone and external conductors can be connected to said chip by mating terminals in said external conductors with said terminal portions of said arms. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
-
-
9. A continuous strip of stamped and formed lead frames, each lead frame of said strip being intended to receive and establish electrical connections to a chip having oppositely directed faces and having two active areas on one of said faces and having one active area on the other face, said strip comprising:
-
a continuous carrier strip, said lead frames being integral with said carrier strip at spaced-apart intervals, each of said lead frames comprising first, second, and third arms, each of said arms being integral with and extending laterally from one edge of said carrier strip, said arms being in side-by-side relationship, said second arm being between said first and third arms, said second arm having a free end which is remote from said carrier strip and having a chip supporting zone which is between said free end and said carrier strip, said free end of said second arm having terminal means for engagement with an external conductor, said first and third arms each being reversely bent at a location spaced from said carrier strip and having free end portions which extend to said chip supporting zone, said free end portions having contact tip portions at said chip supporting zone, said first and third arm having integral terminal means extending therefrom in opposite directions parallel and proximate to said carrier strip whereby, upon placement of a chip member in said chip supporting zone of one of said lead frames with said chip between said contact tip portions of said first and third arms and with said one face of said chip member beneath said contact portions of said first and third arms, said second arm will be in electrical contact with said one active area on said other face and said first and third arms will be in electrical contact with said two active areas on said one face; and
upon severing said arms from said carrier strip, said arms will be connected to said active areas by independent electrical paths. - View Dependent Claims (10)
-
-
11. A package comprising a chip having oppositely directed faces, having two contact areas on one of said faces, and having one contact area in the other face, said package comprising:
-
substrate means, first, second, and third sheet metal arms mounted on said substrate means in parallel side-by-side spaced-apart relationship, said second arm being between said first and third arms, said second arm having a chip supporting surface on, and extending parallel to, said substrate, said chip being on, and in electrical contact with, said chip supporting surface with said other face of said chip against said chip supporting surface, said first and third arms having reverse bends therein intermediate their ends and each having a contact member extending from said reverse bends to said one face of said chip, said contact members having contact tip portions on their ends, said contact tip portion of said first arm being in electrical contact with one of said contact areas and said contact tip portion of said third arm being in electrical contact with the other contact area on said one face of said chip, each of said arms having integral sheet metal terminal portions extending therefrom normally of the plane of said substrate, said terminal portions partially surrounding and forming an enclosure around said chip, insulating housing means on said substrate in enclosing relationship to said arms and said chip, portions of said terminal members extending through said insulating housing whereby, said chip can be electrically connected to external conductors by mating said terminal members with complementary terminal members on said external conductors. - View Dependent Claims (12, 13)
-
Specification