Method for performing double-sided SMT

Electrical connectors – Preformed panel circuit arrangement – e.g. – pcb – icm – dip,... – With mating connector which receives panel circuit edge

Reexamination Certificate

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Details

C439S059000, C029S842000, C029S843000

Reexamination Certificate

active

06227867

ABSTRACT:

FIELD OF THE INVENTION
The present invention relates to a method, and more particularly to a method for performing Surface Mounting Techniques on two sides of a PCB.
DESCRIPTION OF PRIOR ART
A straddle connector includes upper and lower rows of terminals arranged opposite each other with a receiving slot defined therebetween. A PCB having upper and lower golden fingers can be inserted therein and electrical contact is established between the terminals and the corresponding golden fingers. Conventionally, each golden finger is coated with a layer of solder paste which melts when the PCB is passed through an infrared oven. This is generally referred to as an SMT process. However, the SMT process can only be performed on one side of the PCB. After the upper terminals are soldered with the upper golden fingers, the lower terminals must be manually soldered to the lower golden fingers because it is difficult to perform the SMT process on the lower side after the upper side has been completed. In addition, once the upper terminals are soldered to the upper golden fingers, the straddle connector will be tilted upward from a centerline of the PCB thereby further complicating the manual soldering process.
SUMMARY OF THE INVENTION
An objective of this invention is to provide a method for performing SMT on both sides of a PCB.
In order to achieve the objective set forth, a connector assembly comprises a straddle connector including a dielectric housing having a front face forming an island section thereon and a rear face opposite the island section. Upper and lower terminals are embedded within the housing in rows. Each terminal includes a connecting section extending to the island section and a tail section extending beyond the rear face. A retaining slot is defined between the upper and lower rows of tail sections. Each terminal of one of the upper and lower rows has a rearward extension. A PCB having upper and lower rows of golden fingers is inserted into the retaining slot. Each golden finger of one of the upper and lower rows is coated with solder paste. A row of holes is defined in the PCB adjacent to the golden fingers. Each hole is aligned with the extension of the corresponding terminal and has a solder drop disposed therein.
These and additional objects, features, and advantages of the present invention will become apparent after reading the following detailed description of the preferred embodiment of the invention taken in conjunction with the appended drawing.


REFERENCES:
patent: 3792383 (1974-02-01), Knappenberger
patent: 5081764 (1992-01-01), Utunomiya et al.
patent: 5259767 (1993-11-01), Kurbikoff et al.

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