The reachings in the field of deriving modern materials of a microelectronics engineering are especially effective, when the process engineering of manufacture of the concrete device allows maximum to realize the resources, included in active structure.In the report the outcomes of results on a considerable diminution of thermal restrictions generating impatt diodes millimeter (mm) wave band are submitted with the purpose of improving exit pupils and reliability. The complex of original design technological receptions has allowed to solve a problem of making multimesa wave band structures, in which the thermal resistance is possible to reduce in inverse proportionn,where n-number of mesa structures. The sectional process engineering has general purpose character and is applicable to the most composite materials in particular to heterostrucructures and all types of made on their bases microwaves diodes containing a mesa structure. The results are illustrated on silicon double drift six mesa structure 5 mm wave band for which the level of an output continuous power 1.04 watts on frequency 65.9 GH_2 is obtained. Thus p-n junction temperature did not exceed 220℃ usual copper heatsink also was utillized. The electronic snapshots and outcomes of investigation of thermal fields silicon mesa diodes of a various configuration are reduced: to six mesa, eight mesa, ring.Singularity of a sectional process engineering are higher specific mechanical loadings at assembly of devices, therefore with the purpose of a raise of reliability and percent of an exit of suitable devices designed and the procedure permitting to inspect on starting plates amplitude and a strain gradient in active region is tested X-ray diffraction method that is especially important for heterostructure mesa diodes. The reachings in the field of deriviative modern materials of a microelectronics engineering are especially effective, when the process engineering of manufacture of the concrete device allows maximum to realize the resources, included in active structure. The report the outcomes of results on a diminution of thermal restrictions generating impatt diodes millimeter (mm) wave band are submitted with the purpose of improving exit pupils and reliability. The complex of original design technological receptions has allowed to solve a problem of making multimesa wave band structures, in which the thermal resistance is possible to reduce in inverse proportionn, where n-number of mesa structures. The sectional process engineering has general purpose character and is applicable to the most composite materials in particular to heterostrucructs and all types of made on their bases microwaves diodes containing a mesa structure. The results are illustrated on silicon double drift six The electronic snapshots and outcomes of investigation of thermal fields silicon mesa diodes of a various configuration are reduced: to six mesa, eight mesa, ring .ingularity of a sectional engineering engineering are higher specific mechanical loadings at assembly of devices, therefore with the purpose of a raise of reliability and percent of an exit of suitable devices designed and the procedure permitting to inspect on starting plates amplitude and a strain gradient in active region is tested X-ray diffraction method that is especially important for heterostructure mesa diodes.