Bending:

50 micro Al  kapton  50 kapton tested   24. 1. 2005   tape  

Bent over PCB edge  (180 degrees)

uncovered  Al (SnPb plated)

10 bends OK
20 bends  3 breaks
30 bends all lines broken

Al  (SnPb plated) covered with self adhesive kapton

1 st test   20 bends OK
                 50 bends 3 breaks

2nd test     20 bends OK
                   30 bends 1 line broken
                   40 bends lines broken

Bent over defined radius (180 degrees):

r =1.1 mm   bent in SnPb area (bent on metallized side)

1 st test     30  bends one line broken
2nd test    20 bends OK
                  30 bends OK
                  40 bends  3 lines broken

r = 1.1 mm  bent, concered with  self adhesive kapton
                 40 bends OK
                 60 bends OK  

 r = 2 mm bent in SnPb area (bent on metallized side)

40 bends  OK
60 bends   OK
100  bends  OK
150 bends 2 lines broken
200 bends  3 lines broken
250 bends   5 lines broken

r = 2 mm  bent in SnPb area (bent on non metallized side)

50 bends OK
100 bends OK
200 bends OK

50 micro Al  kapton  50 kapton tested   14. 1. 2005   tape 20220212705599

r = 2 mm  - bent in double layer area       

50x            OK        
100x          OK

r = 2 mm  bent in SnPb plated area

50 bends OK

smallest possible radius (bend on back side of tape)
1x              Ok
3x              OK
10x            OK
20x             OK

50 micro Al       50 kapton                   tested 5. 3. 2002

r = 2 mm

20                      OK
40                       1 broken
60                        5 broken

r =  3mm

30                       OK
50                       OK
80                      1 broken
100                     2 lines high R  2 ohms
130                     2 lines broken


50 micro Al, 25micro  kapton                        tested    10.1. 2001

r = 2 mm

No. bends

10                   OK
30                   OK
50                   OK
100                 OK

r =      0.75 mm

10                    OK
30                    OK
50                    1 broken
70                    1 broken
100                  3 broken
120                  3 broken
150                  5 broken