Abstract: The invention relates to a heating device for heating an electrical or electronic component, with the heating device comprising a blower for conveying a gas stream and a heating apparatus through which the gas stream can be guided and heated. The heating device further comprises a heating storage apparatus which is capable of at least partly storing and emitting the heat of the gas stream guided through and heated by the heating apparatus. It also comprises an infrared radiator, with the heat emitted by the heating apparatus and the heating storage apparatus and the heat from the infrared radiator being provided for heating the electronic component. It is thus possible to achieve higher temperatures at the solder contacts of the component than in an individually used infrared radiator or hot-air radiator.

Abstract: A device for making or undoing welds between a component with several galvanic connections and a support is particularly suited for surface mounting. In order to direct a stream of hot gas or infrared radiation accurately onto the connections of the component and corresponding weld surfaces, a mask is provided which has openings that exactly match the configuration of the weld surface. Preferably, in the case of hot-air operation, a light source is arranged behind the mask in such a way that the predetermined pattern is reproduced exactly on the substrate in the form of points of light for positioning purposes. In one embodiment, the mask comprises two pairs of horizontally adjustable shields, the two pairs of shields being arranged at an angle of 90 degrees, the shields being made of a material of low thermal conductivity.