| 摘要 |
<p>The method involves applying a layer (2) on a carrier plate (1). A layer (3), made of optically conductive material, has refractive index larger than that of the layer (2) and is applied on the layer (2). A layer (4) has refractive index smaller than that of the layer (3) and is applied on the layer (3). Two trenches are filled with a material having refractive index smaller than that of the layer (3). An independent claim is also included for a printed circuit board.</p> |
