Holder for depositing optical coatings on sets of strips of light-emitting elements

FIELD: physics.

SUBSTANCE: holder for depositing optical coatings on sets of strips of light-emitting elements has a base with a window for the support element and has guide clamping elements made in form of prismatic bars whose working planes lie on butt-ends of their cross section; a support element and a locking mechanism. The support element is at an angle (0-45)°, and dimensions of the cross profile of the clamping element are related to the thickness of the strip of the light-emitting element, the number of strips in a set and the number of sets in the holder by an expression.

EFFECT: broader technological capabilities of the holder for depositing optical coatings, higher quality of products and cost-effectiveness of production.

1 tbl, 5 dwg

 

The invention relates to the field of quantum electronics, namely the problem of deposition of protective enlightening and reflective coatings on the end faces of the light-emitting elements, and can be used in the manufacture of lasers and light-emitting diodes based compounds AIIIBV.

Known cassette for the deposition of optical coatings on the ends of the light-emitting elements described in the application of Japan No. 62-286295 (MKI4: H01S 3/18, H01L 21/31), consisting of a base within which is located an elastic polymeric material with slots, and the support element for loading strips. The strips are placed in the slots of the sprayed side down until it touches them with a support element, after which the polymeric material is compressed to lock strips and the base is removed from the support element.

However, considered cassette suitable for coating on a large number of light-emitting elements, but coatings can be applied to only one side of the tape (and stripes). In addition, difficult to reuse tapes due to deformation of the elastic material.

The closest analogue is the prototype of the technical nature of the present invention is a cassette for the deposition of optical coatings on the strips of light-emitting elements described in the patent of Russian Federation №1821047, MKI5: H01 33/00, 21/00, H01S 3/18, publ. 12.10.1992, containing the base, which made the window for placing the support element, defined clamping elements on its rails, the supporting element retainer. The locking elements are in the form of prismatic bars with T-shaped profile cross section, and the working plane of each clamping element are located at the ends of horizontal shelves profile of its cross section, and the elements of the cross-sectional profile of the clamping element associated with the length of the cavity light-emitting element value:

L1=(1÷3)Lo, L2=(1÷15)Lowhere

Lo- the length of the cavity light-emitting element,

L1- the height of the working plane of the clamping element,

L2- the height of the clamping element.

The disadvantage of this technical solution are complex fastening systems products, which leads to technologically inefficient processes applying optical coatings and reduces quality of coating.

The invention consists in the following. The problem to which the invention is directed, is to expand the technological capabilities of the cassette for the deposition of optical coatings, improve the quality of products and efficiency of production.

To solve the problem and achieve the technical result is that in the cassette for the deposition of optical coatings on the sets of strips of light-emitting elements, contains the base box to the support element and mounted with its guides clamping elements made in the form of prismatic rods, work planes which are located at the ends of their cross-section, the supporting element and the retainer, the support element is made at an angle α=(0÷45)°, and the sizes of the cross-sectional profile of the clamping element associated with the thickness of the strip light-emitting element, the number of strips in the set and number of sets in the cassette ratio:

where

L4the lower horizontal size of the cross-sectional profile of the clamping element,

L3the upper horizontal size of the cross-sectional profile of the clamping element,

l is the window length of the base tape

n - number of strips in the set

n1the number of clamping elements in the cassette,

d is the thickness of the strips of light-emitting elements,

y is the number of sets in cassette

x - part of the length of the window in the base required for the locking element.

The invention is illustrated graphics, descriptions and examples of specific performance.

1 schematically shows a General view of the cassette for the deposition of optical coatings on the sets of strips of light-emitting elements in the context.

Figure 2 shows a cross-section of the clamping element of the s.

Figure 3 shows a cross-section of the strips of light-emitting elements.

Figure 4 shows a fragment of a cartridge for applying optical coatings with a set of strips on the supporting element, is made at an angle α.

Figure 5 gives examples of loading strips between two clamping elements having different cross-sectional profile.

In the drawings, the following notation.

1 - base

2 - supporting element,

3 - lock,

4 - clamping elements,

5 - sets of strips,

6 - emitting face,

7 - metallization,

Lo- the length of the cavity light-emitting element,

L1- the height of the working plane of the clamping element,

L2- the height of the clamping element,

L3the upper horizontal size of the cross-sectional profile of the clamping element,

L4the lower horizontal size of the cross-sectional profile of the clamping element,

l is the window length of the base tape

n - number of strips in the set

n1the number of clamping elements in the cassette,

d is the thickness of the strips of light-emitting elements,

y is the number of sets in the cassette (not shown),

x - part of the length of the window in the base required for the locking element (not shown).

The proposed cartridge for deposition of optical coatings on the sets of strips Sveti the illuminating elements, presented in figure 1 in cross section, comprises a base 1 with a window, in which is placed a support element 2, made at an angle α=(0÷45)°, the latch 3, the locking elements 4, the sets of strips of light-emitting elements 5.

The cross-section used clamping elements 4 are presented on figa and figb.

On figa presents the cross-section of the clamping element with T-shaped profile, that is, when L4<L3and the height of the clamping surface is smaller than the height of the clamping element, i.e. L1<L2.

On figb presents the cross-section of the clamping element when the ratio L1=L2, L3=L4.

The object for coating are strips of light-emitting elements 5, made of a working structure by dividing it perpendicular to the epitaxial layers. Figure 3 presents the cross-section of the strip, where Lo- the length of the cavity light-emitting element, 6 - emitting face 7 - metallization, d is the thickness of the strips (patterns).

Figure 4 presents a fragment of a cassette with a set of strips on the supporting element, is made at an angle α. In this case, each strip when installing it to the working plane of the clamping element 4 is also at an angle α relative to the plane C-C1perpendicular to the horizontal plane C2-C3. This JV is contributes to the achievement of an equilibrium state defined set of strips, not allowing the strips to roll over or move.

On figa presents the type of load light-emitting elements of the four strips in the cassette, the size of the clamping elements which have the following relationship with the length of the resonator strips Lo<L1<L2, L3>L4.

On figb presents a view of the boot of n numbers (≈20÷30) pieces in the cassette, the size of the clamping elements which have the following relationship with the length of the resonator Lo<L1=L2, L3=L4.

The cassette is designed for coating both sides of the cassettes a and B. During the deposition on the side (see figure 1) tape coatings are almost always uniform across the working surface of the resonator. On side b of the cassette sprayed stream somehow escaped reinforcing elements. The degree of shielding is reduced or is reduced to zero when the number of the loaded strips between a pair of clamping elements, as the surfaces become more accessible to the spray stream. The degree of shielding also depends on the length of the resonator strips, and the smaller the difference between the L2-Lothe shielding is less.

The box at the base of the cartridge (see figure 1) has a length l, which is perpendicular stacked clamping elements and the working strip. The entire length is filled in following the way:

l=ndy+n1L3+x, hence

where

l is the window length of the base tape

n is the number of strips in the set

n1the number of clamping elements in the cassette 4,

d is the thickness of the strips of light-emitting elements,

y - the number of sets of cassette

L3the lower horizontal size of the clamping element (width),

x - part of the length of the window in the base required for the locking element.

The number of n1the clamping elements 4 must be one greater than the number of sets of strips, i.e. n1=y+1.

From the relation for L3it is seen that the more bars in the set n and the smaller sets in the cassette, the less the need for the clamping elements. In this regard, the clamping elements must have an optimal size to preserve the stability of the boot system. They should simultaneously be moved relative to each other in the grooves of the guide members and is not to be outweighed through the free spaces between them.

Loading the cassette tape strips of light-emitting elements is as follows: base 1 is put on the supporting element 2 side a (see figure 1), the locking element 3 to the top of the inclined plane of the support element 2. The locking element 3 is pulled and fixed. Clamping elements 4 is pushed in the direction of the locking element 3, chrome is one, to the work plane which raises a number of strips (2 to n) work light-emitting faces down. Then, to the obtained set next move the clamping element 4, clipping set. This is followed by loading the next set of strips, etc. on the entire working length of the first tape. Then the whole system is fixed locking element 3. Further, the base 1 is removed from the support element 2 and is installed in the installation for spraying first on one side (side A), and then on the other side of the tape (side B) for applying the desired coating on the light-emitting faces of the strips, which are incorporated in the technology of the device.

The unloading of the strips of tape as follows: base 1 cassette set on the supporting element 2, pull the locking element 3 and secured, the locking elements 4 are alternately extend from the side of the clamping element, the strips are placed in a processing container for transfer to the next process operation.

Examples of specific types of load sets of strips of light-emitting elements in the cartridge, determining the number and sizes of the clamping elements are presented in the table.

In the calculations window length reason I was taken equal to 31 mm, and the thickness of the strips of 0.1 mm (100 microns). We used strips from the length of the resonator from 0.45 mm (450 μm) to 0.9 mm (900 μm), which is agrogals in each set from 2 to 30 pieces. This applied clamping elements 4 as with the T-shaped profile having a ratio Lo<L1<L2and clamping elements having the aspect ratio of the Lo<L1=L2. The latter was used for strips with a large length of the resonator 0,7÷0,9 mm

In this case, the uniform coating on the entire surface of the set due to the large number of strips in the set.

As can be seen from the table, volume boot strips in the cassette can be varied in a large range from 20 to 100 pieces, using one square of the tape. The number of clamping elements may be reduced from 11 to 4 pieces.

Thus, the proposed cassette provides the expansion of its technological capabilities and improving the quality of products due to more uniform coatings, increase efficiency by increasing the number of loaded strips per unit area of the cassette and reduce the number of fixing elements in the cassette, the production of which is certain difficulties due to the small size and the stringent requirements for the treatment of surfaces, especially vertical working surfaces of the clamping elements.

Cassette for applying optical coatings on the sets of strips of light-emitting elements containing the base with the window for pornoho element and mounted with its guides clamping elements, made in the form of prismatic rods, work planes which are located on the ends of the supporting element and the latch, wherein the supporting element is made at an angle α=0÷45°, a size of the cross-sectional profile of the clamping element associated with the thickness of the strip light-emitting element by the number of strips in the set and number of sets in the cassette ratio:

where L4the lower horizontal size of the cross-sectional profile of the clamping element;
L3the upper horizontal size of the cross-sectional profile of the clamping element,
l is the window length of the base tape,
n - number of strips in the set,
n1the number of clamping elements in the cassette,
d is the thickness of the strips of light-emitting elements,
y - the number of sets in the tape,
x is a part of the length of the window in the base required for the locking element.



 

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