JPS5821195Y2 - Slit structure for dividing sheet-like alumina substrates - Google Patents

Description

[Detailed Description of the Invention] Generally, it is well known that a thin sheet-like alumina substrate is divided into individual pieces by providing a linear slit groove on one side of the substrate.

However, when dividing a sheet-like alumina substrate with a thick substrate (1, Q mm or more), if a slit groove is provided on one side, protrusions will occur on the side of the substrate at the dividing surface, and it will not be possible to divide it into straight lines. The problem arises that it is not □.

On the other hand, if the slit grooves are made deep to facilitate division, the substrate will be randomly divided into individual pieces during printing or firing operations, making subsequent operations impossible.

The present invention aims to easily divide such a thick sheet-like alumina substrate into desired individual pieces during the dividing operation, and to obtain a flat dividing surface. It is an object of the present invention to provide a slit structure for dividing a sheet-like alumina substrate, which has linear slit grooves having the same groove width and different depths on the front and back surfaces depending on the thickness of the substrate.

Conventionally, for thick sheet-like alumina substrates,
The configuration in which dividing slit grooves are provided on both the front and back surfaces of the substrate is as shown in FIG.
The slit groove 2 has the same depth, or the second
As shown in Figure A, the slit grooves 2 and 2 have the same taper angle.
′ with different depths.

However, in these configurations, when the substrate is divided, protrusions are likely to occur on the dividing surface, as shown in FIG. 1 and FIG. 2.

Furthermore, in this case, if the slit grooves are widened, the effective area of the substrate surface becomes smaller, and there is a risk that the printing paste will flow into the slit grooves during printing.

The present invention has been devised in view of these conventional problems, and one embodiment thereof will be described below with reference to FIG. 3.

As shown in FIG. 3, the present invention has a thick sheet-like alumina substrate 3 with a thickness of 1.0 mm or more.
Groove width dimension d1. The slit grooves 4 and 5 with the same d2 and different groove depths tl and t2 are provided in a straight line, respectively, and the groove width dimensions d t and d 2 are l and 9.
mm or less.

Here, groove width dimension d1. d2 to 1. The reason for setting it below □mm is that if the slit grooves 4 and 5 are widened, the effective area of the surface of the substrate 1 will become smaller, and there is a risk that the printing paste will flow into the slit groove 4 when printing on the printing surface 6. .

As an application example of this invention, a multi-piece sheet-like alumina substrate (substrate thickness 1.3 mm, number of pieces 12 pieces/Si5, -)
), (' are shown in FIG. 4, a and a).

The present invention is constructed as described above, and has the following effects.

(1) By making the width of the slit groove the same on the front and back sides of the board, and increasing the depth of only one groove, the stress on the board during splitting is reduced from the deep groove to the shallow groove. Due to the force acting on the substrate, no protrusions are formed on the splitting surface during splitting, and a flat splitting side surface of the substrate is obtained.

(2) Since the slit grooves can be formed deeply into the substrate without increasing the groove width, the printing pattern on the printing surface of the substrate can be widened, and the printing paste is less likely to flow into the slit grooves.

(3) Even if the depth of the slit groove is deep on one side, the depth of the groove on the other side is shallow, so it can withstand external mechanical forces on the substrate during printing and baking operations, and can achieve desired results. It can be easily divided without producing any protruding surfaces during the dividing operation.

[Brief explanation of the drawing]

Figures 1A and 2A are side views showing the slit groove structure in the conventional example, and Figures 1A and 2A are side views showing the state after division in Figures 1A and 2A. ,
FIG. 3 is a side view showing an embodiment of the slit groove structure according to the present invention, and FIG. 4A is a side view and a top view showing an application example of the slit groove structure of the present invention. 3...Sheet-like alumina substrate, 4,5...
...Slit groove.

Claims (1)

[Scope of utility model registration request] Linear slit grooves having the same groove width but different groove depths are provided on the front and back surfaces of a sheet-like alumina substrate having a substrate thickness of l, Q mm or more, respectively, with groove widths of l, Q mm or less. Slit structure for dividing sheet-like alumina substrates.