Using a multichannel linear laser light beam in making OLED devices by thermal transfer

A method of depositing organic layers onto a substrate in the making of a color OLED device, comprising the steps of:

• (a) providing a plurality of donor elements each having a different organic material and positioning the donor elements in sequential relationship with an OLED substrate;
• (b) forming a substantially uniform linear laser light beam;
• (c) providing a spatial light modulator responsive to the linear laser light beam and adapted to form multichannel linear laser light beams;
• (d) individually modulating selected channels to form one or more laser light beam segments wherein each segment can include one or more laser light beam channels and further wherein the laser light beam segment(s) have substantially square intensity profiles in a first direction and a substantially Gaussian intensity profile in a second direction perpendicular to the first direction and are directed onto the donor element;
• (e) the donor element producing heat in response to the light from the modulated segments so as to heat transfer organic material onto selected areas of the substrate;
• and
• (f) repeating steps (d) and (e) for the different donor elements to thereby form organic layers on the substrate which correspond to different color pixels.

A laser printer for depositing organic layers onto a substrate in the making of an OLED device, comprising:

• (a) a donor element having transferable organic material in transfer relationship with an OLED substrate;
• (b) means for forming a substantially uniform linear laser light beam;
• (c) a spatial light modulator responsive to the linear laser light beam and adapted to form multichannel linear laser light beams;
• (d) means for individually modulating selected channels to form one or more laser light beam segments wherein each segment can include one or more laser light beam channels and further wherein the laser light beam segment(s) have substantially square intensity profiles in a first direction and a substantially Gaussian intensity profile in a second direction perpendicular to the first direction and are directed onto the donor element;
• and
• (e) the donor element producing heat in response to the light from the modulated segments so as to heat transfer organic material onto selected areas of the substrate.