The embodiment of the invention discloses a display panel manufacturing method, a display panel and a
display device. The display panel manufacturing method comprises the steps of providing a substrate base plate; forming multiple light emitting units on the substrate base plate; forming a thin film packaging layer that covers the multiple light emitting units; forming a first film layer on the thin film packaging layer, wherein the distance between a projection, positioned on the substrate base plate, of a margin of a driver
chip binding area on the display panel, which is adjacent to the light emitting units, and a projection, positioned on the substrate base plate, of a margin of the first film layer, which is adjacent to the driver
chip binding area, is greater than or equal to 0 micron, or less than or equal to 100 microns; and positioning the projection, positioned on the substrate base plate, of the first film layer within a projection, positioned on the substrate base plate, of the thin film packaging layer; and to
etching the thin film packaging layer by adopting the first film layer as a covering film so as to overlap the projection, positioned on the substrate base plate, of the margin of the first film layer generate and the projection, positioned on the substrate base plate, of the margin of the thin film packaging layer subjected to
etching. According to the display panel manufacturing method, the display panel and the
display device disclosed by the embodiment of the invention, the packaging effect of the thin film packaging layer in an organic light emitting display panel can be improved.