| 摘要 |
A printhead for an image-forming apparatus, including a substrate, a row of light-emitting elements disposed on a first side of the substrate, and a cooling element disposed on a second side of the substrate opposite to the first side, wherein the substrate is thermally insulating and is provided with at least one thermally conductive track which extends through the substrate from the first side to the second side and is disposed at a predetermined place with respect to the light-emitting elements in order to conduct heat from the first side to the second side in such manner that the elements are kept substantially at a predetermined temperature during operation of the printhead.
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