JEDEC Standard No. 51-8Page 9 Annex A – Ring cold plate design examplePLUG DRILL AND TAP 12 PL M4PLUG R3 104.098.285.5 THREADED HOLES FOR ALIGNMENT POST5 PL FOR EACH BOARD SIZE DRILL 6 mmTAP, 8 PLDRILL 6 mm BLIND HOLE TAP 72.054.036.0 PLUG69.065.063.0INLET 45.0 OUTLET PLUGTHREADED HOLES FOR CLAMP, 2 PL 18.0 27.025.021.0PLUG PLUG 0.0 6.00.0 PLUG PLUG 16.012.06.00.0 BLIND HOLE THROUGH HOLE Figure A1a - Drawing of bottom piece of ring cold plate fixture designed for packages with footprint less than 30 mm in longest dimension. Fabricated from copper and then nickel plated. All dimensions are basic. If 8-32 screws are used instead of M4 to center the test board, threaded holes should be moved 0.1 mm further from the center line of the fixture. Only the externally visible drilled holes are shown in side views. CLEARANCE HOLES FOR ALIGNMENT POST5 PL FOR EACH BOARD SIZE R3PLUG DRILL 4.5 mm 12 PL PLUG 104.098.285.5 CLEARANCE HOLES FOR CLAMP, 2 PL PLUG PLUG69.065.063.0OUTLET45.0INLET 72.054.036.0 DRILL 6 mmTAP, 8 PLDRILL 6mm BLIND HOLE TAP PLUG 27.025.021.0PLUG 18.0 PLUG PLUG 6.00.0 0.0 16.012.06.00.0 THROUGH HOLE BLIND HOLE Figure A1b - Drawing of top piece of the ring cold plate fixture designed for packages with footprint less than 30 mm in longest dimension. Top piece is shown upside down for easy of documenting dimensions. Refer to figure 1 to illustrate assembly. Fabricated from copper and then nickel plated. All dimensions are basic. Only externally visible drilled holes are shown in side views. JEDEC Standard No. 51-8 Page 10 Annex A – Ring cold plate design example DRILL AND TAP 7 PL M4 DRILL 6 mmTAP, 8 PL 85.0 106.00100.294.0PLUG 82.078.0 PLUG PLUG THREADED HOLESFOR ALIGNMENT POST 5 PLPLUG DRILL 6 mm BLIND HOLE TAP 56.038.0 INLET 47.0OUTLET THREADED HOLES FOR CLAMP, 2 PL 9.0 18.016.012.0PLUG PLUG 0.0 0.0 PLUG PLUG 16.012.06.00.0 BLIND HOLE THROUGH HOLE Figure A2a - Drawing of bottom piece of ring cold plate fixture designed for packages on 101.6 mm test board. Fabricated from copper and then nickel plated. All dimensions are basic. Only the externally visible drilled holes are shown in the side views.CLEARANCE HOLES 106.0100.294.0 PLUG DRILL 4.5 mm 7 PL PLUG FOR ALIGNMENT POST 5 PL DRILL 6 mmTAP, 8 PL PLUG 82.078.0 PLUG 85.0 CLEARANCE HOLES FOR CLAMP, 2 PL47.0 OutletInlet 56.038.0 DRILL 6 mm BLIND HOLE TAP 18.016.012.0PLUG PLUG 9.0 0.0 PLUG PLUG 0.0 16.012.06.00.0 THROUGH HOLE BLIND HOLE Figure A2b - Drawing of top piece of ring cold plate fixture designed for packages on 101.6 mm test board. Fabricated from copper and then nickel plated. All dimensions are basic. Onl