Small memory card

Abstract

A small memory card includes a substrate, a plurality of memory chips, a plurality of wires, and a glue layer, the substrate is formed with a plurality of through slots, then the plurality of memory chips be mounted on the substrate, so that the plurality of bounding pads of the memory chip from through slot may be revealed, and use a plurality of wires electrically connecting to the substrate, finally use the glue layer encapsulating a plurality of memory chips at the same time. Thus, the small memory card of present invention has small packed volume, and the manufacturing processes may be convenient.

Description

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates to a small memory card, and in particular to the volume of a small memory card which may be reduced advantageously.

2. Description of the Related Art

The prior method for producing a general memory card always packs chips to single integrated circuits, then mounts the IC onto a printed circuit board by the way of surface mount technique (SMT). The chip may be a memory element, such as flash memory. The golden fingers mounted on the printed circuit board for inserting into a slot of a computer main-board. In addition to some passive elements such as resistance, capacitor and inductor are mounted on the memory card.

Referring to FIG. 1 showing the schematic illustrates of a prior memory card, the golden finger 15 is used to insert into a slot of a computer main-board, there are active elements and passive elements on the module card, the active elements usually are packed to an integrated circuit 11. Each integrated circuit 11 encapsulates a chip 12, which may be a memory chip, for example a flash memory chip. The pins 13 of integrated circuit 11 are mounted on the printed circuit board 14 of the memory card by SMT, the printed circuit board 14 has solder points 17 connected to pins 13. The prior arts has the following disadvantages:

• • 1. A chip 12 must be packed then mounted on the circuit board 14, so more steps is unnecessary leads to the cost in manufacturing and packing will be increased.
  • 2. A memory card always includes many ICs so that the integrated circuit 11 must be mounted on the PCB 14 one by one during manufacturing the module card.
  • 3. The cost of SMT is expensive. Special manufacture devices such as a SMT machine and a solder furnace will extra the cost of equipment.
  • 4. The chip 12 of a small memory card is packed in conventional, so that the volume of a small memory card may not be reduced advantageously.

SUMMARY OF THE INVENTION

The object of the present invention is to provide a small memory card may be manufactured conveniently, the manufacturing processes may be simplified and the manufacturing cost may decrease.

Another object of the present invention is to provide a small memory card with lessen packed size to achieve minimizing the volume of a small memory card advantageously.

To achieve the above-mentioned object, the present invention includes a substrate, a plurality of memory chips, a plurality of wires, and a glue layer. The substrate formed with a plurality of through slots, and a plurality of golden fingers formed on the side of the substrate, the substrate is used to arranged in an electric device, so that, the golden fingers may be connected to the electric device, a plurality of memory chips are mounted on the substrate, thus the plurality of bounding pads from the through slot of the substrate revealed, a plurality of wires, which are arranged in the through slots, electrically connected the bounding pad of a plurality of memory chips to the substrate, and a glue layer is filled within the through slot of the substrate to protect the plurality of wires and to encapsulate the plurality of memory chips at the same time.

According to one aspect of the present invention, the heat of the memory chip may be traveled via the disperse heat slice. Therefore, proving the durability and dependability of small memory card.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic illustrates showing a conventional small memory card structure.

FIG. 2 is the first schematic illustrates showing a small memory card structure with the present invention.

FIG. 3 is the second schematic illustrates showing the small memory card structure with the present invention.

FIG. 4 is another schematic illustrates showing the small memory card structure with the present invention.

DETAILED DESCRIPTION OF THE INVENTION

FIG. 2 and FIG. 3 are showing the schematic illustrates of a small memory card of the present invention, which include a substrate 20, a plurality of memory chips 22, a plurality of wires 24 and a glue layer 26.

The substrate 20 formed with an upper surface 28, a lower surface 30, and a plurality of through slot 32, which penetrate upper surface 28 to lower surface 30, the edge of every through slots 32 of the upper surface 28 formed with a plurality of connected points 34, and a plurality of golden fingers 36, that formed on the side of the substrate 20, electrically connected to the plurality of connected points 34, the substrate is used to arranged in an electric device, so that the golden fingers 36 may be electrically connected to the electric device.

A plurality of memory chips 22 formed with an upper surface 38 and a lower surface 40, there are a plurality of bounding pads in the middle of the upper surface 38, the upper surface 38 of every memory chips 22 are mounted on the lower surface 30 of the substrate 20, thus, the plurality of bounding pads 42 respectively from symmetric through slot 32 revealed.

Each of the wires 24, which formed with first connected points 44 and second connected points 46, are arranged in the through slot 32 of the substrate 20, the first connected point 44 electrically connected to the connected point 34 of the substrate 20, the second connected point 46 electrically connected to the bounding pad 42 of the memory chip 22.

The glue layer 26 is encapsulated the upper surface 28 of the substrate 20 and filled in every through slots 32, so that the plurality of wires 24 may be protected, also encapsulated the lower surface 30 of the substrate 20 and the plurality of memory chips 22 at the same time.

Refer to FIG. 4, in the embodiment, the glue layer 26 encapsulated a plurality of memory chips 22 at the same time, and revealed the lower surface 40 of a plurality of memory chips 22 from the glue layer 26, thus, the present invention having high function of disperse heat to promote its durability and lifetime effectively.

Therefore, the small memory card of the present invention has the following advantages.

• • 1. Since the plurality of memory chips 22 connect electrically to the packed structure of substrate 20 by center fuse manner to achieve minimizing the volume of a small memory card advantageously.
  • 2. Since the revealed glue layer 26, which encapsulates the lower surface 40 of the plurality of memory chips 22, the heat of the memory chip 22 may can be rapidly spread out, so that, proving the durability and dependability of the small memory card.
  • 3. Since arrange the memory chip 22 on the substrate 20 first, then use glue layer 26 encapsulating a plurality of memory chips 22 at the same time, so as to the manufacturing processes may be simplified and the manufacturing cost may decreased.

While the invention has been described by way of an example and in terms of a preferred embodiment, it is to be understood that the invention is not limited to the disclosed embodiment. To the contrary, it is intended to cover various modifications. Therefore, the scope of the appended claims should be accorded the broadest interpretation so as to encompass all such modifications.

Claims

1. A small memory card to be set in an electric device, comprising: A substrate having an upper surface, a lower surface and a plurality of through slot penetrate the upper surface to the lower surface; the upper surface formed with a plurality of connected points on the edge of the every through slots and arranged a plurality of golden fingers to electrically connect to the plurality of connected points on the side of the substrate, the substrate is used to set in the electric device, so that, the golden finger may be electrically connected to the electric device; At least a memory chip having an upper surface and a lower surface, the middle of the upper surface formed with a plurality of bonding pads, the upper surface of every memory chips being mounted on the lower surface of the substrate, so that, the plurality of bonding pads of the substrate respectively from symmetric through slots may be revealed; Each of the plurality of wires has a first connected point and a second connected point, the wires being arranged in the through slot of the substrate, the first connected point electrically connected to the connected point of the substrate, the second connected point electrically connected to the bounding pad of the memory chip; and A glue layer being encapsulated the upper surface of the substrate and filled within the through slot to protect the plurality of wires and encapsulate the lower surface of the substrate to coat a plurality of memory chips at the same time.

2. The small memory card according to claim 1, wherein the substrate is formed with two through slots, the amount of memory chips may be two.

3. The small memory card according to claim 1, wherein the revealed glue layer encapsulated the lower surface of a plurality of the memory chips