Nokia 6 Cellphone April 7th, 2017 Xiaoming Chen PennEngineering 1
Overview Nokia 6 has a 5.5-inch FHD IPS display with a polarizer film covered with 2.5D Gorilla Glass for protection. The smartphone comes in a black 6000 series aluminum uni-body chassis with flat edges that are milled using a CNC machine from a single brick of aluminum alloy. 2
Details & Findings Pictures and Description of the Nokia 6 and the Disassembly Process. 3
Step 1: Power off the cellphone and take out the SIM card tray Get the card tray out of the phone with an E-Ject pin equipped with. 4
Step 2: Removing the display panel assembly By using a heat gun/hairdryer soften the glue for removing display panel assembly from aluminum alloy phone case beneath the panel assembly before the separation starts. Then using the suction cup hold the panel and open a rip with a plug tool. After that, plug in the rip and move the panel up and down until the device is completely open. The panel assembly and the phone case is still connected to each other by a flex cable. 5
Step 2: Removing the display panel assembly The cable fastened by one flat head M1x1.74 screw (circled in Blue) passes through a hole in the metal-springcontact first and last, and then screws up into the threads inside of the SMT nut illustrated on the slides #15, #18, #22 welded on the top circuit board. The display panel is free to be removed when the cable is disconnected. The screw details are as below M1 x 1.74 mm overall length 2.35 mm head diameter 0.33 mm head thickness Nylon locking patch #00 Phillips drive Flat head Carbon Steel + Bright Nickel 6
Step 3: Removing Home button flex cable Disconnect the Home button flex cable before removing the M1.2 x 2.77 screw (circled in Blue) from the aluminum alloy phone case. The screw goes through a hole in the metal-spring-contact and then fastens the flex cable by the external threads engaging in the threads inside the molded-in nuts illustrated on the slides #11, #13 and #22 molded into the aluminum alloy phone case beneath the middle casting part. The screw details are as below M1.2 x 2.77 mm overall length 2.29 mm head diameter 0.52 mm head thickness Nylon locking patch #00 Phillips drive Flat head Carbon Steel + Bright Nickel 7
Step 4: Removing the middle aluminum casting plate Middle aluminum casting plate is held down by 18 screws. All of the screws go through a hole in the middle aluminum casting plate and then screw up into the threads inside the molded-in nuts illustrated on the slides #11, #13 and #22 molded into the aluminum alloy phone case beneath the middle casting part. The screws can be broadly categorized into two basic types, one long screw (circled in Pink) and seventeen short screws. metal-spring-contact The screw details are as below M1.2 x 4.64 mm overall length 2.24 mm head diameter 0.48 mm head thickness Nylon locking patch #00 Phillips drive Flat head Carbon Steel + Bright Nickel The screw details are as below M1.2 x 2.80 mm overall length 2.3 mm head diameter 0.52 mm head thickness Nylon locking patch #00 Phillips drive Flat head Carbon Steel + Bright Nickel 8
Step 4: Removing the middle aluminum casting plate The middle aluminum casting plate is free to go when the flex cable is disconnected. Flex Cable 9
Step 5: Removing the top circuit boards from the aluminum alloy phone case Disconnect the flex cable and signal cable before removing the circuit boards out of the phone case. Release four M1.2 screws (circled in Blue) and two M1 screws (circled in Green) that hold the top circuit board by the threads held inside the molded-in nuts illustrated on the slides #11, #13 and #22, passing through the holes in the metalspring-contact and then fastened screwed the threads inside of the SMT nut illustrated on the slides #15, #18, #22 welded on the top circuit board, separately. The screw details are as below M1.2 x 2.75 mm overall length 2.25 mm head diameter 0.53 mm head thickness Nylon locking patch Machined #00 Phillips drive Flat head Carbon Steel + Bright Nickel The screw details are as below M1 x 1.70 mm overall length 2.32 mm head diameter 0.32 mm head thickness Nylon locking patch Machined #00 Phillips drive Flat head Carbon Steel + Bright Nickel 10
Step 5: Removing the top circuit boards from the aluminum alloy phone case With the top circuit board removed there are twenty molded-in nuts (circled in Pink) for fastening the top circuit board and flex cables with the external threads pass through a hole in the middle aluminum casting plate and the metal-spring-contacts and then engage in the threads that are machined inside of the molded-in nuts illustrated on the print below and slide #13 and #22. 11
Step 6: Removing the top circuit boards from the aluminum alloy phone case Disconnect the signal cable before removing the bottom circuit boards from the phone case. Release one M1.2 screws (circled in Green) and three M1 screws (circled in Blue) that fastens the bottom circuit board by the threads inside of the molding-in nuts illustrated on the slides #11, #13 and #22 molded into the aluminum alloy phone case beneath the middle casting part. The screw details are as below M1 x 1.70 mm overall length 2.29 mm head diameter 0.32 mm head thickness Nylon locking patch Machined #00 Phillips drive Flat head Carbon Steel + Bright Nickel The screw details are as below M1.2 x 2.78 mm overall length 2.15 mm head diameter 0.5 mm head thickness Nylon locking patch Machined #00 Phillips drive Flat head Carbon Steel + Bright Nickel 12
Step 6: Removing the top circuit boards from the aluminum alloy phone case With the bottom circuit board removed there are four molded-in nuts (circled in Pink) appeared for fastening the bottom circuit board by the external threads go through a hole in the circuit board and then engage in the threads that are machined inside the molded-in nuts illustrated on the print below and slide #11 and #22. 13
Step 7: Removing the signal wire Three M1.2 screws (circled in Pink) hold the wire through the external threads that go through the hole in the sheet metal parts and then engage with the threads that are machined inside the molding-in nuts illustrated on the slides #11, #13 and #22 molded into the aluminum alloy phone case beneath the middle casting part. The screw details are as below M1.2 x 2.0 mm overall length 2.27 mm head diameter 0.49 mm head thickness Nylon locking patch Machined #00 Phillips drive Flat head Carbon Steel + Bright Nickel 14
Step 8: Removing flex cable from bottom circuit board The flex cable is secured to the bottom circuit board by one M1 screw fastening into the threads inside the SMT nut illustrated on the slide below and slide #18, #22 welded on the bottom circuit board. The screw details are as below M1 x 1.78 mm overall length 2.33 mm head diameter 0.34 mm head thickness Nylon locking patch Machined #00 Phillips drive Flat head Carbon Steel + Bright Nickel 15
Step 9: Removing front camera, rear camera, loudspeaker and battery from the aluminum alloy phone case. The cameras are easy to take out as they are fitted with the flex cables. The loudspeaker can easily be detached without even using a screwdriver. The battery is fastened with double-sided adhesive tapes. In this step, no mechanical fasteners were found. 16
Other findings At the bottom of the middle aluminum casting plate there are two brass molded-in bushings for holding the bottom circuit board together with the aluminum alloy phone case beneath the middle casting part. 17
Other findings On the top circuit board there are three SMT M1 nut for securing the flex cables with screws through holes in the metal-spring-contacts. The M1 SMT nut is illustrated in the picture below and slide #15, #22. 18
The picture below contains all the components from the NOKIA 6 disassembly: 19
Fastener Summary 20
Fasteners Summary / Screws Many fasteners used in this device add extra rigidity to the phone and make it easier to take apart. All of the fasteners in this phone are listed in the following table: Item Thread Overall Length Head Dia. Head Thick. Driver Plating Nylock Qty. Slide No 1 M1.0 Screw 1.74 2.35 0.33 Phillips #00 Bright Nickel Yes 2 #6 2 M1.2 Screw 2.77 2.29 0.52 Phillips #00 Bright Nickel Yes 1 #7 3 M1.2 Screw 4.64 2.24 0.48 Phillips #00 Bright Nickel Yes 1 #8 4 M1.2 Screw 2.8 2.3 0.52 Phillips #00 Bright Nickel Yes 17 #8 5 M1.2 Screw 2.75 2.25 0.53 Phillips #00 Bright Nickel Yes 4 #10 6 M1.0 Screw 1.7 2.32 0.32 Phillips #00 Bright Nickel Yes 2 #10 7 M1.0 Screw 1.7 2.29 0.32 Phillips #00 Bright Nickel Yes 3 #12 8 M1.2 Screw 2.78 2.15 0.5 Phillips #00 Bright Nickel Yes 1 #12 9 M1.2 Screw 2 2.27 0.49 Phillips #00 Bright Nickel Yes 3 #12 10 M1.0 Screw 1.71 2.26 0.33 Phillips #00 Bright Nickel Yes 1 #14 11 M1.0 SMT Micro Nut 1.15 / / / Tin-Plated / 4 #15,#18, #22 12 M1.2 Micro Molded-in Nut 0.92 / / / Bright Nickel / 27 #13,#22 13 M1.0 Micro Molded-in Nut 0.92 / / / Bright Nickel / 4 #13,#22 14 φ2.9/φ1.4 X 1.0 Brass Bush 1 / / / / / 2 #17, #22 21
Fasteners Summary / Screws All the fasteners that were found in this device can be categorized in 4 different groups: M1 & M1.2 Nylon locking patch #00 Phillips drive Flat head Carbon Steel + Bright Nickel Quantity: 35 Reference slide #6, #7, #8 #10, #12, #14, #15 1.15 mm overall length O.D. : 2.4 mm Thread class: M1 Quantity: 4 Reference slide #15, #18 1.0 mm overall length O.D. : 2.9 mm I.D. : 1.4 mm Thread class: None Quantity: 2 Reference slide #17 M1 & M1.2 Thread class: 6H Quantity: 31 Reference slide #13 22
Alternate Solutions PennEngineering recommendations of alternative hardware and cost savings opportunities. 23
Alternate Solutions PennEngineering is fully capable of making all of the fasteners shown on slides #4 - #17. In addition to direct replacement and perhaps some manufacturing and material substitution for functional and cost improvement, some alternate fastening suggestions are presented for specific cases on the following slides.
Alternate Solutions Micro screws alternate solution: PennEngineering can provide all off these screws with different design solutions. PEM has license with TORX, TORX PLUS, MICROSTIX driver and self-tapping thread patent as like TAPTITE, FASTITE, REMFORM and REMFORM F. 25
Alternate Solutions PEM TackSert parts: The screws that are used to hold the PC board, earphone jack and power charge on the main body of the device, can be replaced by TackSert pins. The TackSert pins are a permanent solution but the press-in installation is significantly quicker than the typical screw assembly. 26
Alternate Solutions PEM micro Clip fasteners (patent pending): PennEngineering micro Clip fasteners can be used to assemble multiple layers together such as flexible PCB with stainless steel upper panel, both to the Al-Mg substrate, bringing the fastener head profile to a minimum of 0.15 mm vs. 0.6 mm head height of current screws used, while retaining the clamp load. 27
Alternate Solutions Φ2.9/Φ1.4 X 1.0 brass bush alternate solution: MicroPEM thru-threaded brass inserts for plastics introduce ideal fastener solutions to attach components in compact electronic assemblies. The brass bush can be replaced by MSIB series micropem inserts without hole threaded. PennEngineering can provide different sizes and types of MSIA to meet the application requirement. The new MSIA series offer light weight, lead-free alternative. 28
Alternate Solutions M1 & M1.2 molded-in nut alternate solution: The molded-in nuts can be replaced by MSO4 micropem self-clinching standoffs. PennEngineering can provide the MSO4 standoffs in different sizes and types to meet the application requirement. 29
Alternate Solutions M1 SMT Micro Nut alternate solution: The M1 SMT micro nut can be replaced by SMTSO micropem surface mount fasteners. PennEngineering can provide the SMTSOs with different sizes and types to meet the application requirement. 30
Conclusions and Summary We found several components in the device for fastening purposes. The middle aluminum casting plate underneath the display panel assembly is held by 19 screws, covers and gives the phone extra rigidity. The top circuit board and bottom circuit board are kept in place with the use of screws. There s plenty of room for the battery in the phone case. The battery is attached with double-sided adhesive tape. The front camera and rear camera are easy to remove as they are connected with flex cables. The loudspeaker can be easily removed without the use of a screwdriver. Despite all the fasteners, the Nokia 6 actually proved quite easy to take apart. PennEngineering can produce all of the fatseners used in the phone within our current manufacturing facilities. PEM Type MSO4 micropem standoffs enable components to be mounted and/or spaced in compact electronic assemblies, especially suiting applications where space may be extremely limited for attachment hardware. Type MSIB micropem brass inserts from PennEngineering provide reusable metal threads to attach plastics securely in compact electronic assemblies. The inserts install permanently where designed into ABS, polycarbonate, and other plastic substrates by pressing them into the host material using ultrasonic equipment or thermal press. The new MSIA series of Aluminum alloy with different sizes and types offer light weight, lead-free alternative. With PEM micro-smtso you can benefit from all the advantages of SMT technology even with the smallest components. Made of tin-plated steel, SMTSO can be soldered together with other components using the reflow process. The miniature nuts are available in thread sizes M1 to M1.6 and in lengths from 1 to 3 mm. As an alternative approach, all of the micro screws can be replaced by PennEngineering manufactured micro screws. PEM has license with Microstix, Torx and Torx Plus driver and self-tapping thread patent such as TAPTITE, FASTITE, REMFORM and REMFORM F with different design solutions. 31