JPH0731541Y2 - Pre-coating device for semiconductor element - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a precoating apparatus for semiconductor elements.

<Outline of the Invention> In connection with the deviceization of the precoating work of the lead frame having the semiconductor element attached to the tip, the precoat liquid contained in the tank is transferred to the roller surface, and the precoat liquid on the roller surface is attached to the tip of the frame.

<Prior Art> Particularly in a semiconductor light emitting device, when the light emitting device is attached to the tip of a lead frame, the tip of the frame is generally formed into a cup shape in order to improve the luminous efficiency. Therefore, when resin molding is performed by a casting method or the like, air bubbles are generated in the cup, which causes a problem of reduced brightness and reliability. Therefore, before resin molding, it is necessary to perform pre-coating so that air bubbles do not enter the cup at the tip of the frame.

Conventionally, this precoat has been performed manually. That is, the operator holds both ends of the lead frame and soaks the end of the frame in the precoat liquid in the bath.

<Problems to be solved by the device> However, the dipping angle, depth, speed, dipping time, etc. were not stable, and there were obstacles such as air bubbles entering the cup and the amount of resin adhering to it varied. .

The precoat device of the present invention solves the above problems and contributes to rationalization.

<Means for Solving Problems> A tank containing the precoat liquid, a roller rotatably arranged in the tank, and the roller being rotated to transfer the precoat liquid to the surface of the roller, and after transfer, It is configured to include a drive unit that stops the rotation of the roller, and a unit that transfers the precoat liquid to be attached to the tip portion of the lead frame when the rotation of the roller is stopped.

<Operation> By rotating the roller as described above, a predetermined amount of the precoat liquid is transferred to the roller surface, and when the rotation of the roller is stopped, the cup-shaped tip of the lead frame is applied to the transferred precoat liquid. The pre-coat liquid gradually rises in the cup and is evenly applied. Therefore, the amount of resin can be made uniform without generating bubbles.

<Embodiment> An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 shows a set state, in which a rotatable roller 3 is installed in a tank 2 containing the precoat liquid 1. As shown in FIG. 5, the roller 3 is connected to a motor (not shown) or the like which is intermittently operated via a pulley 4 and a belt 5. In addition, the lead frame 6 remains stopped at the predetermined position in this state.

Next, the roller 3 is rotationally driven as shown in FIG. 2, and the precoat liquid 1 is transferred onto the surface of the roller 3. When the transfer is completed, the roller 3 stops rotating. As a result, a predetermined amount of the precoat liquid 1 is transferred onto the surface of the roller 3. Then, the tip of the lead frame 6 is applied to the transferred precoat liquid 1a.

FIG. 6 shows the rotating mechanism of the clamp portion for fixing the lead frame 6, and the roller 3 is rotated from the predetermined position in FIG.
The movement is controlled by rotating up to near the surface of. The state in which the movement is controlled to the vicinity of the surface of the roller 3 is shown in FIG. 3, and the tip portion of the lead frame 6 is in contact with the transferred precoat liquid 1a. As a result, the resin is attached to the cup as if it were rising.

After the attachment, the lead frame 6 is returned to the original position as shown in FIG. 4 to complete the precoating. Here, by replacing the lead frame 6 on the tank 2 with a new one and repeating the above (FIGS. 1 to 4) again, it is possible to automatically pre-coat the tip portion of the lead frame 6 with resin. Become.

<Effect of the Invention> As described above, according to the present invention, it is possible to provide a useful precoating device capable of uniformly precoating the tip portion of each lead frame with resin and contributing to rationalization.

[Brief description of drawings]

1 to 4 are configuration diagrams showing states in different states in one embodiment of the present invention, FIG. 5 is a configuration diagram showing details of the same main portion, and FIG. 6 is details of other main portions. It is a block diagram shown. 1 ... Precoat liquid, 2 ... Tank, 3 ... Roller, 6 ... Lead frame.

Claims (1)

[Scope of utility model registration request] 1. A tank containing a precoat liquid, a roller rotatably disposed in the tank, and the roller being rotated to transfer the precoat liquid onto the surface of the roller, and after the transfer, the rotation of the roller is stopped. A precoat apparatus for a semiconductor element, comprising: a driving unit for driving the roller; and a unit for transferring a precoat liquid attached to the cup-shaped tip of the lead frame when the rotation of the roller is stopped.