Method for manufacturing a heat exchanger plate comprising the following steps: - providing a plate stack , which is formed from at least two plate elements made of a metallic material with a solder material arranged between the plate elements , - transferring the plate stack into a heated hot forming tool having a lower tool and an upper tool , which has contact surfaces with at least one channel cavity , - inserting the plate stack into the hot forming tool , wherein the plate stack is positioned on spacer elements , which are arranged flexibly in the lower tool and project relative to the contact surface of the lower tool , - closing the hot forming tool , wherein the lower tool and the upper tool are displaced relative to each other, - continuing the closing movement and clamping the plate stack between the lower tool and the upper tool , wherein the spacer elements in the lower tool are displaced into the lower tool and the plate stack comes into surface contact between the lower tool and the upper tool , - heating the plate stack and - applying internal pressure to a space between the plate elements of the plate stack by introducing an active medium and forming a channel by using internal pressure to transform at least one plate element region into the channel cavity , wherein the channel cavity is vented, and - melting the solder material between the plate elements and joining the plate elements , by soldering to joining surfaces of the plate elements that are in contact, - opening the hot forming tool , wherein the lower tool and the upper tool are displaced relative to each other, wherein the spacer elements are moved in the lower tool out of the lower tool , such that the plate stack is held at a distance from the lower tool on the spacer elements in the lower tool , - holding and cooling the plate stack , - opening the hot forming tool until a removal position (E) is reached and removing the heat exchanger plate from the hot forming tool . - providing a plate stack , which is formed from at least two plate elements made of a metallic material with a solder material arranged between the plate elements , - transferring the plate stack into a heated hot forming tool having a lower tool and an upper tool , which has contact surfaces with at least one channel cavity , - inserting the plate stack into the hot forming tool , wherein the plate stack is positioned on spacer elements , which are arranged flexibly in the lower tool and project relative to the contact surface of the lower tool , - closing the hot forming tool , wherein the lower tool and the upper tool are displaced relative to each other, - continuing the closing movement and clamping the plate stack between the lower tool and the upper tool , wherein the spacer elements in the lower tool are displaced into the lower tool and the plate stack comes into surface contact between the lower tool and the upper tool , - heating the plate stack and - applying internal pressure to a space between the plate elements of the plate stack by introducing an active medium and forming a channel by using internal pressure to transform at least one plate element region into the channel cavity , wherein the channel cavity is vented, and - melting the solder material between the plate elements and joining the plate elements , by soldering to joining surfaces of the plate elements that are in contact, - opening the hot forming tool , wherein the lower tool and the upper tool are displaced relative to each other, wherein the spacer elements are moved in the lower tool out of the lower tool , such that the plate stack is held at a distance from the lower tool on the spacer elements in the lower tool , - holding and cooling the plate stack , - opening the hot forming tool until a removal position (E) is reached and removing the heat exchanger plate from the hot forming tool . <EOS>