CN201323195Y - Triode - Google Patents

Abstract

A triode, including a chip, a frame, a bonding wire welded between the chip and the frame to electrically connect the chip and the frame, and a plastic packaging compound wrapped outside the chip and the bonding wire to protect the chip, The lead length of the triode is 5-8mm. By shortening the length of the pins of the triode, material saving is realized to reduce the cost of materials, and at the same time, the weight of the product is reduced, so that the transportation cost of a single product is reduced.

Description

Triode

【Technical field】

The utility model relates to the technical field of electronic components, in particular to a triode.

【Background technique】

Transistors are small in size, light in weight, low in power consumption, long in life, and high in reliability. They have been widely used in broadcasting, television, communications, radar, computers, automatic control devices, electronic instruments, household appliances, and other fields for amplification, oscillation, and switching. effect.

With the development of semiconductor technology, the packaging technology of triode is also developing rapidly. In order to reduce costs, continuous innovations are being made in the process, such as the reduction of the feature size of semiconductor chips, and the introduction of a large number of new materials, new processes and new device structures.

Usually, the frame of the triode is made of metal material, which plays the role of conduction and heat dissipation. The frame occupies a certain proportion in the cost of the triode. In some triodes that require high electrical conductivity and heat dissipation performance, the frame is made of pure copper and other materials, resulting in higher cost of the triode.

【Content of utility model】

In view of this, it is necessary to provide a low-cost triode to solve the problem of high cost of the traditional triode.

In order to solve the above technical problems, the following technical solutions are proposed:

A triode, including a chip, a frame, a bonding wire welded between the chip and the frame to electrically connect the chip and the frame, and a plastic packaging compound wrapped outside the chip and the bonding wire to protect the chip, The lead length of the triode is 5-8mm.

Preferably, the lead length of the triode is 7.5mm.

Preferably, the width of the free end of the pin of the triode is gradually reduced.

Preferably, the minimum width of the free end of the lead of the triode is 0.36mm.

Preferably, the lead length of the frame making the triode is 10.46mm.

Preferably, the width of the bottom rib forming the frame of the triode is 3.6 mm.

Preferably, the middle and bottom ribs of the triode frame are cut off at one time.

Preferably, the length of the frame for making the triode is 22.06mm.

By shortening the length of the pins of the triode, material saving is realized to reduce the cost of materials, and at the same time, the weight of the product is reduced, so that the transportation cost of a single product is reduced.

【Description of drawings】

Figure 1 is a schematic diagram of the frame of the triode;

Fig. 2 is a schematic diagram of the frame size of a traditional triode;

FIG. 3 is a schematic diagram of the frame size of the triode of the present embodiment;

Fig. 4 is the structure diagram of triode;

Figure 5 is a finished product diagram of a traditional triode;

FIG. 6 is a finished view of the triode of this embodiment.

【Detailed ways】

The triode after packaging mainly includes a chip, a frame, a bonding wire connecting the chip and the frame, and a plastic encapsulant wrapped around the chip and the bonding wire to protect the chip and the bonding wire. In the following embodiments, according to the production and performance requirements of the triode, without affecting it, by shortening the length of the triode pins, material saving is realized to reduce the cost of materials, and at the same time reduce the weight of the product, so that a single Shipping costs for products are reduced.

As shown in FIG. 1 , the frame 100 of the triode includes a body 110 , pins 120 , middle ribs 130 and bottom ribs 140 . The pins 120 include an emitter pin 122 , a collector pin 124 and a base pin 126 . Wherein, the collector pin 124 is directly connected to the body 110 , and the emitter pin 122 and the base pin 126 are respectively located on two sides of the collector pin 124 . The middle rib 130 is connected to the emitter pin 122, the collector pin 124 and the base pin 126 at one end close to the body 110; the bottom rib 140 is connected to the emitter pin 122, the collector pin 124 and the base pin at the other end 126. The bottom rib 140 can connect the frames 100 of multiple triodes together.

FIG. 2 is a schematic diagram of the frame size of a conventional triode, and FIG. 3 is a schematic diagram of the size of the frame 100 of the triode in this embodiment. Comparing Fig. 3 and Fig. 2, it can be seen that the frame length of this embodiment is reduced by 7.3mm compared with the traditional frame length. Specifically, the frame length of the traditional triode is reduced from 29.36mm to 22.06mm in this embodiment.

Theoretically, the shorter the frame 100 is, the more material can be saved. However, as shown in FIG. 4 , since the frame body needs to place the chip 200 and connect the chip 200 and the frame 100 with the bonding wire 300 , the length of the frame body 110 cannot be easily changed. In this embodiment, the length of the body 110 is 8 mm, and the material can be saved by changing the length of the pin 120 . As shown in FIG. 2 and FIG. 3 , the length of the frame pin 120 of this embodiment is reduced from the conventional 18.16 mm to 10.46 mm.

In addition, the width of the bottom rib 140 is improved from 3.2mm to 3.6mm, the purpose is to strengthen the strength of the frame 100 and prevent the frame from deforming during processing (in this embodiment, each bottom rib 140 connects 25 frames 100). Since the width of the bottom rib 140 is increased, the strength of the frame 100 is enhanced. In the process of processing the triode 10, the method of cutting the middle rib 130 and the bottom rib 140 at one time can be adopted, compared with the traditional method of separately cutting the middle rib 130 and the bottom rib 140. , can improve production efficiency.

Further, in order to make it more convenient for the user to insert the pin 120 of the triode 10 into the through hole of the circuit board, the width of the free end of the pin is gradually reduced (as shown in FIG. 3 and FIG. 6 ), that is, the pin 120 The free end of the chip is changed to a pointed pin, which is convenient for inserting into a smaller circuit board through hole. In this embodiment, the minimum width of the free end of the pin is 0.36mm.

As shown in FIG. 5 and FIG. 6 , they are schematic diagrams of finished products of a conventional triode and the triode of this embodiment, respectively. The pin length of the cost of the triode of the present embodiment (the chip 200, the bonding wire 300 and part of the frame 100 are encapsulated with a plastic encapsulant, such as epoxy resin, and the length of the exposed frame pin) is changed from the traditional one. 15mm shortened to 7.5mm. In other embodiments, the lead length of the triode can be controlled within the range of 5-8 mm according to the needs of the actual product, and the tolerance can be controlled within the range of ±0.05 mm.

In the above embodiment, the frame 100 of the triode 10 is reduced from 29.36mm to 22.06mm, which saves 24.86% of the copper material used in making the frame. After the frame lead is shortened, the energy and material consumption in the packaging process are reduced, such as reducing the heat energy consumption in the bonding process, reducing the use of protective gas nitrogen and hydrogen, and reducing the amount of tin in the electroplating process. Usage and so on. Improve the user's use efficiency: the existing triode is a power device in the field of energy-saving lamps, electronic ballasts, mobile phone chargers, etc., and its standard short leg length is 15mm. In actual use, such a length is not required , in application, insert the triode on the circuit board and dip it in tin for soldering, cut off the long legs after heating, which wastes both copper and tin. In order to save tin, some manufacturers first cut off part of the long legs, and then The plug-in is dipped in tin and cut neatly, which adds a process. Due to the shortened pins, the weight of raw materials and finished products is reduced, the transportation cost is reduced, and the transportation efficiency is improved.

The above-mentioned embodiments only express several implementations of the utility model, and the description thereof is relatively specific and detailed, but it should not be construed as limiting the patent scope of the utility model. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the scope of protection of the utility model patent should be based on the appended claims.

Claims (8)

1, a kind of triode; comprise chip, framework, be welded between described chip and the framework, be wrapped in described chip and bonding wire is outer to protect the plastic packaging material of described chip with the bonding wire that is electrically connected described chip and framework; it is characterized in that the pin length of described triode is 5-8mm.

2, triode according to claim 1 is characterized in that, the pin length of described triode is 7.5mm.

3, triode according to claim 1 is characterized in that, the free-ended width of the pin of described triode dwindles gradually.

4, triode according to claim 3 is characterized in that, the free-ended minimum widith of the pin of described triode is 0.36mm.

5, triode according to claim 1 is characterized in that, the pin length of making the framework of described triode is 10.46mm.

6, triode according to claim 1 is characterized in that, the width of end muscle of making the framework of described triode is 3.6mm.

7, triode according to claim 6 is characterized in that, the middle muscle of the framework of described triode and end muscle are disposable excision.

8, triode according to claim 1 is characterized in that, the length of making the framework of described triode is 22.06mm.

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