Apple iphone 8. PennEngineering

Transcription

1 Apple iphone 8 March 2018 by Jon Brunk PennEngineering 1

2 Apple iphone 8 2

3 Details & Findings Pictures and Description of the iphone 8 and our disassembly process. 3

4 Exterior 2 screws in bottom of the case, long dog point, pentalobe drive (yellow, p.35 row 1) Thru right angle metal tabs in screen (red) Thread into case wall (green) Screen secured with adhesive 4

5 Inside the Phone Screen Regions Top Bottom Side Tabs Case Regions Battery Top Left Top Right Mid Right Bottom Right Taptic Engine Bottom Sides 5

6 Screen Top 3 screws attach a cover over the camera and speaker (yellow, p.35 row 2, 3) 2 additional screws used to hold speaker assembly (red, p.35, row 4) All of these screws thread into metal inserts, see next page 6

7 Screen Top Under speaker are 4 conductive points Springs in speaker used to maintain contact (red) Overall 6 threaded inserts used in this region, install into plastic (p.41, threaded inserts) 7

8 Screen Bottom 4 Triwing drive screws attach metal cover along bottom row (p.35, row 5) 3 thread into metal inserts 1 threads into boss on back side of home button Boss Threaded Inserts 8

9 Screen Side Tabs 3 short Triwing drive screws along each side (p.36 row 1) Thread into weld nuts at a right angle to the screen (p41, weld nuts) Tabs fit into brackets in the case 9

10 Battery Only adhesive used to attach battery 10

11 Case Mid Right 11

12 Case Mid Right 4 screws (red, p36 row 2, 3) attach metal cover over flex connections 1 into superscrew (gold, p36 row 4) 1 into PCB standoff (blue, p41) 2 thru hole, surface mount PCB standoffs (green, p41) 3 weld standoffs, attached to the case (p41) 12

13 Case Top Right 13

14 Case Top Right 3 screws attach metal cover over flex connections (red, p36 row 5) 1 threads into PCB standoff (blue, p41) 2 thread into superscrews (yellow and green) 1 superscrew (yellow, p37 row 2) and 1 screw (gold, p37 row 1) secure another cover over the camera, into tapped holes 14

15 Case Top Right 1 superscrew and 1 screw fasten metal bracket in corner thread into welded standoff and tapped hole Superscrew (green, p37 row 3) Short screw (yellow, p37 row 5) 1 superscrew and 1 short screw attach a widget, thread into tapped holes Superscrew (red, p37 row 4) Short screw (white, p38 row 1) 1 hidden screw holds bracket, threads into weld standoff (blue, p38 row 2) 15

16 Case Top Left 16

17 Case Top Left 4 screws attach metal and plastic cover (yellow, p38 row 3) 3 thread into surface mount PCB standoffs (white) 1 threads into tapped hole in case wall (orange) 2 screws attach thin metal bar (blue, green) 1 threads into PCB standoff (blue, p38 row 4) 1 into thru-hole standoff, then into weld standoff (p38 row 5) 2 screws connect bracket to PCB/case (red) 1 short screw into tapped hole in the case (row 4) 1 long screw thru PCB into weld standoff (row 5) 17

18 Motherboard 6 threaded standoffs, soldered on (yellow, p41, PCB standoffs) 3 unthreaded standoffs, soldered on, knurled at bottom (blue, p41, PCB Thru-Hole standoffs) 18

19 Case Bottom Right 19

20 Case Bottom Right Speaker assembly held by a total of 5 screws 1 superscrew (gold, p36 row 4) 3 screws attach L shaped bracket, which also holds down the lightning connector (red) 1 threads into a superscrew (p39 row 2) 2 on bottom thread into weld standoffs (p 39 row 1) 2 screws along right side (yellow) 1 threads into weld standoff (p39 row 4) 1 into case tapped hole (p39 row 3) 20

21 Case Bottom Right Detail of hardware in this location 2 weld standoffs (p41) 1 superscrew (p40, row 1) 1 tapped hole (bottom right corner of case, p41) Detached speaker assembly 21

22 Taptic Engine 22

23 Taptic Engine Taptic engine held in two places 1 screw (red, p39 row 5) Threads into weld standoff (easier to see on page 27 and 28) Passes through two brackets, two layers of bent metal 1 superscrew (gold, p40 row 1) Attachment point is a welded collar attached to a flange Threads into weld standoff 23

24 Case Bottom 24

25 Case Bottom Plastic and rubber seal utilizes two screws (red, p40 row 2) 1 into weld standoff 1 into tapped hole in the case Additional screw thru PCB into weld standoff (blue, p40 row 3) 2 screws hold lightning port, thread into weld standoffs (yellow, p40, row 2) 25

26 Case Bottom Attachment point at bottom of the phone case 2 screws thread into blind holes in case wall (p40 row 4) Threads are angled slightly Screws pass thru thin flanges Lightning connector and speaker assembly also held by adhesive 26

27 Case Bottom Detail of weld standoffs and tapped holes Total of 4 tapped holes, 2 are on an angle (yellow) 6 weld standoffs with different flange shapes (p41) Weld standoffs for Taptic Engine 27

28 Case All major components now removed 16 weld standoffs spread around the case (yellow) 6 threaded bosses in the case (circled in red) Behind black tape is wireless charging coil 28

29 Case Sides and Buttons 29

30 Case Sides and Buttons 3 metal brackets attached to sides of the case 2 screws per bracket, or total of 8 screws (below in blue, p40 row 5) Thread into tapped holes (p41) Welded tabs around the tapped holes in the wall 30

31 Case Sides and Buttons Tabs on the screen fit into the brackets attached to case walls. 31

32 Case Sides and Buttons Volume buttons and sound/mute toggle switch 3 screws attach back plate with sensors for each button (yellow, p41, row 1) Under each screw head is a rubber seal Thread into tapped holes in side of the case (p41) 32

33 iphone 8 Disassembled 33

34 Fastener Summary 34

35 Fastener Summary Location Quantity Driver Exterior 2 P2 Pentalobe Thread Diameter Overall Length Head Diameter Head Thickness M Back to: Page 4 Screen Top 2 Phillips #000 M Page 6 Screen Top 2 Phillips #000 M Page 6 Screen Top 2 Phillips #000 M Page 6 Screen Bottom 4 Tri-point Y000 M Page

36 Fastener Summary Location Quantity Driver Screen Sides 6 Tri-point Y000 Thread Diameter Overall Length Head Diameter Head Thickness M Back to: Page 9 Case - Mid Right 2 Phillips #000 M Page 12 Case - Mid Right 2 Phillips #000 M Page 12 Case - Mid Right 1 Cross Slots M Page 12 or Page 20 Case - Top Right Cover 3 Phillips #000 M Page

37 Fastener Summary Location Quantity Driver Case - Top Right Camera 2 Phillips #000 Thread Diameter Overall Length Head Diameter Head Thickness M Back to: Page 14 Case - Top Right Camera 1 Cross Slots M Page 14 Case - Top Right Bracket 1 Cross Slots M Page 15 Case - Top Right Widget 1 Cross Slots M Page 15 Case - Top Right Bracket 1 Phillips #000 M Page

38 Fastener Summary Location Quantity Driver Case - Top Right Widget 1 Phillips #000 Thread Diameter Overall Length Head Diameter Head Thickness M Back to: Page 15 Case - Top Right Hidden 1 Phillips #000 M Page 15 Case - Top Left 4 Phillips #000 M Page 17 Case - Top Left 2 Phillips #000 M Page 17 Case - Top Left 2 Phillips #000 M Page

39 Fastener Summary Location Quantity Driver Case - Bottom Right 2 Phillips #000 Thread Diameter Overall Length Head Diameter Head Thickness M Back to: Page 20 Case - Bottom Right 1 Tri-point Y000 M Page 20 Case - Bottom Right 1 Phillips #000 M Page 20 Case - Bottom Right 1 Phillips #000 M Page 20 Taptic Engine 1 Phillips #000 M Page

40 Fastener Summary Location Quantity Driver Taptic Engine 1 Cross Slots Thread Diameter Overall Length Head Diameter Head Thickness M Back to: Page 21 or Page 23 Case - Bottom 4 Phillips #000 M Page 25 Case - Bottom 1 Phillips #000 M Page 25 Case - Bottom 2 Phillips #000 M Page 26 Case - Sides 8 Phillips #000 M Page

41 Fastener Summary Location Quantity Driver Case - Sides 3 Phillips #000 Thread Diameter Overall Length Head Diameter Head Thickness M Back to: Page 32 Type Quantity Thread Size Type Quantity Thread Size Back to: PCB Standoffs 6 M1 Page 12 Page 14 Page 18 Weld Nuts 9 M1 Back to: Page 9 Weld Standoffs 16 M1, M1.2 Page 12 Page 21 Page 27 Page 28 PCB Thru- Hole Standoff 3 N/A Page 12 Page 18 Threaded Inserts 6 M1.2 Page 7 Tapped Holes 24 M1, M1.2 Page 21 Page 28 Page 30 Page

42 Alternate Solutions PennEngineering recommendations of alternate hardware and cost savings opportunities. 42

43 Rotary Installation Replace weld standoffs with rotary installed standoffs Uses torque and reduced axial force to prevent damage to cosmetic surfaces Failure mode is the screw Micro fasteners install into material as thin as 0.5mm No protrusion above the top surface of the panel Requires a blind milled hole. 43

44 Clamp Disk Fastener Clamp Disk installs onto a pin or cast post. Thru-holes allow for removability. Generates clamp load due to flexing of the downward facing flanges. Axial installation force. (Patent Pending) 44

45 TackSert & TackPin Fasteners Replace screws with TackSert Pins for brittle materials and TackPin Fasteners for ductile materials where serviceability is not needed. Simple joining method for permanent joints. Many different head designs are available. 45

46 Conclusions and Summary 46

47 iphone 8 Teardown Total of 62 screws, 5 superscrews, 6 PCB standoffs, 16 weld standoffs, 6 weld nuts, 9 threaded inserts, and 24 tapped holes Many screws attach more than one layer of material (reduces the total number needed) Lots of adhesive used to hold screen to case and hold components within the phone. Many weld points as well 47