DESCRIPTION The present invention relates to an optoelectronic component.

Optoelectronic components with integrated optical elements are known in the state of the art. It is known to provide op ^¬ toelectronic components with housing bodies with integrated optical reflectors and optical elements arranged on the hous ^¬ ing body.

It is an object of the present invention to provide an optoe ^¬ lectronic component. This objective is achieved by an optoe- lectronic component with the features of claim 1. Various em ^¬ bodiments are disclosed in the dependent claims.

An optoelectronic component comprises a housing body and an optical element. A rabbet comprising a shoulder and a cheek is formed on an upper side of the housing body. The optical element is received in the rabbet such that a brim of the op ^¬ tical element rests on the shoulder of the rabbet.

Advantageously, the rabbet of the housing body protects the optical element of this optoelectronic component against an accidental removal. In particular, the rabbet may protect the optical element from being pulled or sheared off. This de ^¬ creases the risk of damaging the optoelectronic component. According to an embodiment of the optoelectronic component, a height of the rabbet differs from a thickness of the brim of the optical element by less than 20%, preferably by less than 10%. Advantageously, the rabbet of the housing body provides a particularly effective protection of the optical element in the case that the height of the rabbet and the thickness of the brim of the optical element are approximately equal. In an embodiment of the optoelectronic component, a gap is formed between the brim of the optical element and the cheek of the rabbet. The gap comprises a width below 200 ym or be ^¬ low 100 ym. Advantageously, a gap with such a width both al- lows an easy mounting of the optical element on the housing body and provides a precise alignment of the optical element relative to the housing body.

In an embodiment of the optoelectronic component, an obtuse angle is enclosed between the cheek of the rabbet and the shoulder of the rabbet. Advantageously, the obtuse angle sim ^¬ plifies mounting of the optical element in the rabbet of the housing body of the optoelectronic component. The obtuse an ^¬ gle provides an automatic centring of the optical element in the rabbet of the housing body.

In an embodiment of the optoelectronic component, a glue is arranged between the shoulder of the rabbet and the brim of the optical element. Advantageously, the glue fixates the op- tical element in the rabbet. A further advantage of the rab ^¬ bet is that the cheek of the rabbet prevents the glue from being squeezed out to the outside of the housing body. Fur ^¬ thermore, the rabbet may serve to increase the contact sur ^¬ face between the housing body, the glue and the optical ele- ment, increasing the adhesion between the housing body and the optical element.

In an embodiment of the optoelectronic component, the glue extends to a region between the cheek of the rabbet and the brim of the optical element. Advantageously, glue arranged in the region between the cheek of the rabbet and the brim of the optical element increases the contact surface between the rabbet of the housing body, the glue and the brim of the op ^¬ tical element, thus increasing adhesion between the housing body and the optical element.

In an embodiment of the optoelectronic component, the upper side of the housing body comprises a rectangular shape. The shoulder of the rabbet is formed only at the corners of the rabbet. Advantageously, this allows a construction of the housing body of the optoelectronic component with very small outer dimensions.

In an embodiment of the optoelectronic component, the housing body comprises a reflector cavity having an opening at the upper side of the housing body. Advantageously, the reflector cavity of the housing body may serve to house an optoelec- tronic semiconductor chip of the optoelectronic component.

In an embodiment of the optoelectronic component, the rabbet encircles the opening of the reflector cavity. Advantageous ^¬ ly, this allows the rabbet to support and hold the optical elements in multiple spatial directions.

In an embodiment of the optoelectronic component, the optical element covers the opening of the reflector cavity. Advanta ^¬ geously, light emitted inside the reflector cavity passes the optical element before being radiated from the optoelectronic component. A further advantage of the optical element cover ^¬ ing the opening of the reflector cavity is that the optical element provides protection for components of the optoelec ^¬ tronic component arranged inside the reflector cavity.

In an embodiment of the optoelectronic component, a side wall of the reflector cavity forms a reflector. Advantageously, the reflector formed by the side wall of the reflector cavity may serve to reflect and converge light emitted by an optoe- lectronic semiconductor chip arranged in the reflector cavity of the housing body of the optoelectronic component.

In an embodiment of the optoelectronic component, the reflec ^¬ tor comprises a gold coating. Advantageously, the reflector comprises a high reflectivity and is insensitive to aging.

In an embodiment of the optoelectronic component, the glue partially covers the reflector. Advantageously, the glue cov- ering parts of the reflector may serve to improve the homoge ^¬ neity of light radiated from the optoelectronic component.

In an embodiment of the optoelectronic component, the optical element comprises an optical lens. Advantageously, the opti ^¬ cal lens may serve to form light radiated from the optoelec ^¬ tronic component.

In an embodiment of the optoelectronic component, the optical lens is arranged on a lower side of the optical element. The optical lens extends into the reflector cavity. Advantageous ^¬ ly, this allows for a particularly compact construction of the optoelectronic component. Having the optical lens ar ^¬ ranged on the lower side of the optical element and inside the reflector cavity allows the outer side of the optical el ^¬ ement to be flat, providing a uniform and insensitive outer appearance of the optoelectronic component.

In an embodiment of the optoelectronic component, the lens is asymmetric. Advantageously, an asymmetric optical lens allows to deflect light in one selected direction such that the op ^¬ toelectronic component comprises a tilted viewing angle.

In an embodiment of the optoelectronic component, the optical lens is a Fresnel lens. Advantageously, this allows for a compact design of the optical lens.

In an embodiment of the optoelectronic component, the optoe ^¬ lectronic component comprises a carrier having a die attach pad arranged on an upper side of the carrier and a solder pad arranged on a lower side of the carrier. The housing body is arranged on the upper side of the carrier. Advantageously, the carrier of the optoelectronic component may serve to car ^¬ ry one or more optoelectronic semiconductor chips and other components of the optoelectronic component. The carrier may also serve to electrically connect electric components of the optoelectronic component. In an embodiment of the optoelectronic component, at least one via contact extends through the carrier between the die attach pad and the solder pad. Advantageously, the via con ^¬ tact may serve to remove heat generated by an optoelectronic semiconductor chip arranged on the die attach pad of the carrier .

In an embodiment of the optoelectronic component, a lower side of the housing body comprises a cut-out. An optoelec- tronic semiconductor chip is arranged on the die attach pad of the carrier in the cut-out of the housing body. Advanta ^¬ geously, the optoelectronic semiconductor chip may serve to emit electromagnetic radiation. The optoelectronic semicon ^¬ ductor chip may be an LED chip, for example.

The above-described properties, features and advantages of this invention and the way in which they are achieved will become clearer and more clearly understood in association with the following description of the exemplary embodiments which are explained in greater detail in association with the drawings, in which, in schematic representation:

Fig. 1 shows a perspective view of a housing body of an opto ^¬ electronic component;

Fig. 2 shows a perspective view of a carrier of an optoelec ^¬ tronic component;

Fig. 3 shows a perspective view of an optical element of an optoelectronic component;

Fig. 4 shows a bottom side of the optical element comprising an optical lens; Fig. 5 shows a top view of the housing body, the carrier and an optoelectronic semiconductor chip; Fig. 6 shows a sectional view of an optoelectronic component comprising the carrier, the housing body, the optoelectronic semiconductor chip and the optical element; Fig. 7 shows a partially transparent perspective view of the optoelectronic component; and

Fig. 8 shows a further perspective view of the optoelectronic component .

Fig. 1 shows a perspective view of a housing body 100 in schematic depiction. The housing body 100 is designed to be a part of a package of an optoelectronic component, for example a light emitting diode component.

The housing body 100 comprises an approximately cuboid shape with an upper side 101 and a lower side 102 opposed to the upper side 101. The housing body 100 comprises a reflector cavity 110. The reflector cavity 110 has an opening 120 at the upper side 101 of the housing body 100. At the lower side 102 of the housing body 100, the reflector cavity 110 forms a cut-out 130. To ^¬ gether, the reflector cavity 110 forms a tunnel extending through the housing body 100 between the opening 120 at the upper side 101 of the housing body and the cut-out 130 at the lower side 102 of the housing body 100.

The opening 120 at the upper side 101 of the housing body 100 has a larger area than the cut-out 130 at the lower side 102 of the housing body 100. Between the cut-out 130 and the opening 120 the reflector cavity 110 widens such that a side wall 140 of the reflector cavity 110 is convex. The side wall 140 of the reflector cavity 110 forms a reflec ^¬ tor 150. To this end, the side wall 140 of the reflector 150 may comprise a gold coating 160. The gold coating 160 may, however, be omitted. The housing body 100 may comprise a plastic material, for ex ^¬ ample a black polyphthalamide (PPA) . The housing body 100 may be produced by molding, for example.

The housing body 100 comprises a rabbet 200 arranged at the upper side 101 of the housing 100. The rabbet 200 comprises a rectangular shape and extends along the outer edges of the upper side 101 of the housing body 100. Consequently, the rabbet 200 encircles the opening 120 of the reflector cavity 110. The rabbet 200 may also be referred to as a frame.

The rabbet 200 comprises a shoulder 210 and a cheek 220. The shoulder 210 is oriented parallel to the upper side 101 of the housing body 100 and is offset from the upper side 101 of the housing body 100. The cheek 220 of the rabbet 200 is ori ^¬ ented upwards and encloses the shoulder 210 of the rabbet 200. The cheek 220 comprises a height 211 measured in a di ^¬ rection perpendicular to the upper side 101 of the housing body 100 such that the shoulder 210 of the rabbet 200 is off ^¬ set with respect to the upper side 101 by the height 211.

The cheek 220 of the rabbet 200 may be oriented perpendicular to the shoulder 210 of the rabbet. It is also possible that an obtuse angle 230 larger than 90° is enclosed between the cheek 220 of the rabbet 200 and the shoulder 210 of the rab ^¬ bet 200. The figure show an embodiment in which the angle 230 is obtuse with more than 90°. Near corners 240 of the rectangular rabbet 200, the shoulder 210 of the rabbet 200 has an extensive area, while at the centres of the edges of the upper side 101 of the housing body 100, the opening 120 of the reflector cavity 110 extends up to the cheek 220 of the rabbet 200 such that the width of the shoulder 210 diminishes to zero. Consequently, the shoul ^¬ der 210 of the rabbet 200 is formed only at the corners 240 of the rabbet 200. Fig. 2 shows a schematic perspective view of a carrier 400. The carrier 400 can be a printed circuit board (PCB) , for ex ^¬ ample. The carrier 400 has a flat shape with an upper side 401 and a lower side 402 opposed to the upper side 401.

A die attach pad 410 and a wire attach pad 420 are arranged at the upper side 401 of the carrier 400.

Fig. 3 shows a schematic perspective view of an optical ele- ment 300. Fig. 4 shows a schematic bottom view of the optical element 300. The optical element 300 comprises an optically transparent material and is designed for forming light that passes through the optical element 300. The optical element 300 may comprise an epoxy, for example. The optical element 300 may be produced by molding, for example.

The optical element 300 comprises a rectangular board 305 with an upper side 301 and a lower side 302 opposed to the upper side 301. The board 305 comprises a thickness 311 meas- ured between the upper side 301 and the lower side 302.

The upper side 301 of the board 305 of the optical element 300 is flat. In other embodiments however, the upper side 301 of the board 305 of the optical element 300 may be struc- tured.

At the lower side 302 of the board 305, the optical element 300 comprises an optical lens 330. The optical lens 330 is attached to the lower side 302 of the board 305 and covers only a central part of the lower side 302 of the board 305 such that the projecting parts of the board 305 form a brim 310. The parts of the lower side 302 of the board 305 that are not covered by the optical lens 330 form bearing surfaces 320. The bearing surfaces 320 are the parts of the lower side 302 of the parts of the board 305 that forms the brim 310.

The optical lens 330 is a converging lens and is designed as a Fresnel lens with an outer section 350 and an inner section 360 in the example depicted in Figs. 3 and 4. The optical lens 330 may, however, be designed differently, for example as a spherical convex lens. In the example depicted in Figs. 3 and 4, the optical lens 330 is asymmetric. An optical axis 340 of the optical lens 330 of the optical element 300 is oriented not perpendicular to the upper side 301 and the lower side 302 of the board 305 of the optical element 300, but inclined with respect to a direction perpendicular to the lower side 302 of the board

305 of the optical element 300. In other embodiments however, the optical lens 330 may be symmetric.

Fig. 5 shows a schematic top view of the housing body 100 of Fig. 1 and the carrier 400 of Fig. 2 in a partially assembled state .

An optoelectronic semiconductor chip 500 has been arranged on the die attach pad 410 on the upper side 401 of the carrier 400. The optoelectronic semiconductor chip 500 has been elec ^¬ trically connected to the wire attach pad 420 on the upper side 401 of the carrier 400 with a bond wire 510. The optoe ^¬ lectronic semiconductor chip 500 is designed for emitting electromagnetic radiation, for example visible light. The op- toelectronic semiconductor chip 500 may be a light emitting diode chip (LED chip), for example.

The housing body 100 has been arranged above the upper side 401 of the carrier 400 such that the lower side 102 of the housing body 100 faces the upper side 401 of the carrier 400. The optoelectronic semiconductor chip 500 and the bond wire 510 are arranged in the cut-out 130 of the reflector cavity 110 of the housing body 100 such that the optoelectronic sem ^¬ iconductor chip 500 is arranged inside the reflector cavity 110 of the housing body 100.

It is possible to arrange the housing body 100 above the up ^¬ per side 401 of the carrier 400 before or after arranging the optoelectronic semiconductor chip 500 on the die attach pad 410 at the upper side 401 of the carrier 400.

A glue 260 has been arranged on the shoulder 210 of the rab- bet 200 of the housing body 100 in the corners 240 of the rabbet 200. The glue 260 may have been attached by stamping, for example. It is possible to apply the glue 260 to the shoulder 210 such that at first only parts of the shoulder 210 are covered by the glue 260. Afterwards, the glue 260 may spread to cover most or all of the surface of the shoulder 210 of the rabbet 200.

Fig. 6 shows a schematic sectional view of the housing body 100, the carrier 400 and the optoelectronic semiconductor chip 500 after assembling the optical element 300 to complete the manufacturing of an optoelectronic component 10. Fig. 7 shows a schematic and partially transparent perspective view of the optoelectronic component 10. Fig. 8 shows a further schematic perspective view of the optoelectronic component 10.

The optical element 300 has been placed on the upper side 101 of the housing body 100 such that the optical element 300 is received in the rabbet 200. The lower side 302 of the optical element 300 is oriented towards the housing body 100 and the carrier 400. The bearing surfaces 320 of the brim 310 of the optical element 300 rest on the shoulder 210 of the rabbet 200. The glue 260 previously arranged on the shoulder 210 of the rabbet 200 holds the optical element 300 in the rabbet 200. The glue 260 is arranged between the shoulder 210 of the rab ^¬ bet 200 and the bearing surfaces 320 of the brim 310 of the optical element 300. Some amount of the glue may have been pushed to a region between the cheek 220 of the rabbet 200 and the brim 310 of the optical element 300. Some of the glue 260 may have flown into the reflector cavity 110 and may cov- er a part of the side wall 140 of the reflector cavity 110 forming the reflector 150.

It is convenient that the height 211 of the shoulder 210 of the rabbet 200 of the housing body 100 approximately equals the thickness 311 of the brim 310 of the optical element 300. The height 211 of the shoulder 210 of the rabbet 200 may dif ^¬ fer from the thickness 311 of the brim 310 of the optical el ^¬ ement 300 by not more than 10% or by not more than 20% or by not more than 50 ym, for example.

It is convenient that the size of the board 305 of the opti ^¬ cal element 300 is a little smaller than the area of the rab ^¬ bet 200 of the housing body 100. This allows that a small gap 250 is formed between the brim 310 of the optical element 300 and the cheek 220 of the rabbet 200 when the optical element 300 is received in the rabbet 200. The gap 250 may comprise a width 251 measured near the shoulder 210 of the rabbet 200 which is below 200 ym or below 100 ym, for example.

The optical element 300 received in the rabbet 200 covers the opening 120 of the reflector cavity 110 of the housing body 100. The optical lens 330 of the optical element 300 extends into the reflector cavity 110 of the housing body 100. The outer surface of the outer section 350 of the optical lens 330 may closely follow the shape of the side wall 140 of the reflec ^¬ tor cavity 110. If the optical lens 330 is asymmetric, the reflector cavity 110 of the housing body 100 may have an ac ^¬ cording asymmetry.

The recessed inner section 360 of the optical lens 330 leaves enough space for the optoelectronic semiconductor chip 500 arranged on the upper side 401 of the carrier 400. The opti ^¬ cal lens 330 of the optical element 300 may comprise a notch 370 for receiving the bond wire 510. A solder pad 430 is arranged at the lower side 402 of the carrier 400. The solder pad 430 is arranged opposite to the die attach pad 410 arranged on the upper side 401 of the car ^¬ rier 400. The die attach pad 410 and the solder pad 430 are electrically connected to each other by a plurality of via contacts 440 that extend through the carrier 400. The solder pad 430 thus provides an electric connection to the optoelec ^¬ tronic semiconductor chip 500 of the optoelectronic component 10. The solder pad 430 allows to electrically connect the op- toelectronic component 10 by means of a surface mount tech ^¬ nology, for example by reflow soldering.

The via contacts 440 may not only provide an electrical con ^¬ nection between the die attach pad 410 and the solder pad 430, but may also provide a good thermal contact. Heat gener ^¬ ated by the optoelectronic semiconductor chip 500 during op ^¬ eration of the optoelectronic component 10 may be removed through the die attach pad 410, the via contacts 440 and the solder pad 430.

The invention has been illustrated and described in more spe ^¬ cific detail on the basis of the preferred exemplary embodi ^¬ ments. Nevertheless, the invention is not restricted to the examples disclosed. Rather, other variations can be derived therefrom by the person skilled in the art, without departing from the scope of protection of the invention.

REFERENCE SYMBOLS

10 optoelectronic component 100 housing body

101 upper side

102 lower side

110 reflector cavity

120 opening

130 cut-out

140 side wall

150 reflector

160 gold coating

200 rabbet

210 shoulder

211 height

220 cheek

230 obtuse angle

240 corner

250 gap

251 width

260 glue

300 optical element

301 upper side

302 lower side

305 board

310 brim

311 thickness

320 bearing surface

330 optical lens

340 optical axis

350 outer section

360 inner section

370 notch 400 carrier

401 upper side

402 lower side

410 die attach pad

420 wire attach pad

430 solder pad

440 via contact optoelectronic semiconductor chip bond wire