JPH01292845A - Semiconductor case - Google Patents

Abstract

PURPOSE:To reduce the number of processes to discriminate IC attributes by providing a mark for discriminating the attributes to show the IC attributes to an external lead terminal of a semiconductor case. CONSTITUTION:A semiconductor case body 1 has a plurality of external lead terminals 2 which are connected to an IC sealed in the inside thereof and expose to the outside. Each external lead terminal 2 has attributes which are determined by the IC. For example, external lead terminals 2c, 2d have attributes as an earth terminal and power source terminal, respectively. The discrimination mark 3 has colors corresponding to the attributes of the IC such as red for the attributes of a power source terminal and blue for the attributes of an earth terminal; and each is provided on the surface of the external lead terminals 2c, 2d. According to this constitution, when mounting a semiconductor case on a substrate, attributes of an IC inside the semiconductor case body 1 can be readily discriminated through visual observation.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a semiconductor case having a plurality of external lead terminals connected to an IC sealed inside and exposed to the outside.

[Prior Art] Conventionally, this type of semiconductor case has a structure as shown in FIG.
It had a plurality of external lead terminals 2 connected to an IC sealed inside and exposed to the outside.

The external lead terminals 2 all have the same shape and are led out to the outside regardless of the attributes of the IC (ground terminal, power terminal, etc.) inside the semiconductor case.

For this reason, for example, the external lead terminal 2a has the attribute of a power supply terminal, and the external lead terminal 2b has the attribute of a ground terminal.
were derived to the outside with the same shape.

[Problems to be Solved by the Invention] In the conventional semiconductor case described above, external lead terminals of the same shape are led out regardless of the attributes of the IC, so it is difficult to determine the attributes of the IC for the semiconductor case mounted on the board. When identifying it, there is a drawback that it cannot be determined based on its appearance. For this reason, it is necessary to use a tester to search for each external lead terminal on the board based on the drawing of the inner layer of the board, resulting in a drawback that a large number of steps are required for identification.

Even if the identification is based on the shape of the land on the board at the corresponding position to the semiconductor case and external lead terminal,
■The shape of the land cannot be determined because the solder used to mount the semiconductor case on the board bulges onto the land. ■Due to the high packaging density of semiconductor cases, etc. on the board, the lands on the board are in the shadow of the semiconductor case, making it difficult to confirm the shape of the lands. ■Since the shape of the land was not originally changed depending on the attributes of the IC, it had the disadvantage that it was difficult to judge.

[Means for Solving the Problems] In order to solve the above-mentioned conventional problems, the semiconductor case of the present invention makes it possible to identify the attributes of the internal IC from the outside. In a semiconductor case having a plurality of external lead terminals exposed to the outside and connected to an IC sealed in the IC, the external lead terminal is connected to the IC sealed in the semiconductor case.
The configuration is such that a mark for attribute identification is provided to represent the attribute.

[Example] Next, an example of the present invention will be described with reference to the drawings.

Figure 1 is a perspective view of one embodiment of the present invention, and Figure 2 is Figure 1A.
It is a sectional view between -A.

The semiconductor case of this embodiment basically consists of a semiconductor case body 1, an external lead terminal 2, and a mark 3 provided on the external lead terminal 2 for attribute identification.

The semiconductor case body 1 has a plurality of external lead terminals 2 connected to an IC sealed inside and exposed to the outside.

The external lead terminals 2 each have attributes determined by the IC. For example, the external lead terminal 2c.

2d has attributes as a ground terminal and a power supply terminal, respectively.

The mark 3 for attribute identification has a color corresponding to the attribute of the IC. For example, the attribute of the power terminal is red, and the attribute of the earth terminal is blue.
It is provided on the surface of 2d. The mark 3 for attribute identification is provided on the external lead terminals 2c, 2d by applying red or blue paint, or by adhering red or blue thin plates or the like.

In addition to the color identification, the attribute identification mark 3 is
The shape of the external lead terminal 2 may be changed depending on its attributes.

In this way, according to this embodiment, the external lead terminals 2c,
By providing blue and red attribute identification marks 3 on 2d, it is possible to easily visually identify the attributes of the IC inside the semiconductor case body 1 when the semiconductor case is mounted on a board. Become.

[Effects of the Invention] As described above, the present invention provides a semiconductor case having a plurality of external lead terminals connected to an internally sealed IC and exposed to the outside, in which an attribute identification representing an attribute of the IC is provided on the external lead terminal. By having a configuration with a mark for identifying the attribute, it is possible to judge the attributes of the IC from the mark for attribute identification, which eliminates the need for conventional identification using a tester or judgment based on the shape of the land on the board. , it is possible to significantly reduce the number of man-hours required to identify the attributes of an IC.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing an embodiment of the semiconductor case of the present invention, FIG. 2 is a sectional view taken along line A--A in FIG. 1, and FIG. 3 is a perspective view of a conventional semiconductor case. l: Semiconductor case body 2: External lead terminal 2c: External lead terminal (power terminal) 2d: External lead terminal (ground terminal) 3: Mark for attribute identification

Claims (1)

[Scope of Claims] A semiconductor case having a plurality of external lead terminals connected to an IC sealed inside and exposed to the outside, wherein the external lead terminals are provided with attribute identification marks representing attributes of the IC. Characteristic semiconductor case.